Adapter KF-16 to ISO-63 Large Flange, Flange Size ISO-KF NW-16 to ISO-LF NW-63, Stainless Steel These adapters are KF-16 to ISO-63 large flange (LF). The flange size follows ISO standards and are NW-16 to NW-63. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter KF-16 to ISO-63 Large Flange, Flange Size ISO-KF NW-16 to NW-63, Stainless Steel Flange Size: ISO-KF NW-16 to ISO-LF NW-63 Common Dimensions: A = 1.77 (45mm), B = 0.62 (17mm)

Adapter KF-16 to ISO-80 Large Flange, Flange Size ISO-KF NW-16 to ISO-LF NW-80, Stainless Steel These adapters are KF-16 to ISO-80 large flange (LF). The flange size follows ISO standards and are NW-16 to NW-80. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter KF-16 to ISO-80 Large Flange, Flange Size ISO-KF NW-16 to NW-80, Stainless Steel Flange Size: ISO-KF NW-16 to ISO-LF NW-80 Common Dimensions: A = 1.77 (45mm), B = 0.63 (16mm)

Adapter KF-16 to ISO-100 Large Flange, Flange Size ISO-KF NW-16 to ISO-LF NW-100, Stainless Steel These adapters are KF-16 to ISO-100 large flange (LF). The flange size follows ISO standards and are NW-16 to NW-100. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter KF-16 to ISO-100 Large Flange, Flange Size ISO-KF NW-16 to NW-100, Stainless Steel Flange Size: ISO-KF NW-16 to ISO-LF NW-100 Common Dimensions: A = 1.77 (45mm), B = 0.63 (16mm)

Adapter KF-16 to ISO-160 Large Flange, Flange Size ISO-KF NW-16 to ISO-LF NW-160, Stainless Steel These adapters are KF-16 to ISO-160 large flange (LF). The flange size follows ISO standards and are NW-16 to NW-160. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter KF-16 to ISO-160 Large Flange, Flange Size ISO-KF NW-16 to NW-160, Stainless Steel Flange Size: ISO-KF NW-16 to ISO-LF NW-160 Common Dimensions: A = 1.77 (45mm), B = 0.63 (16mm)

Adapter KF-25 to ISO-63 Large Flange, Flange Size ISO-KF NW-25 to ISO-LF NW-63, Stainless Steel These adapters are KF-25 to ISO-63 large flange (LF). The flange size follows ISO standards and are NW-25 to NW-63. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter KF-25 to ISO-63 Large Flange, Flange Size ISO-KF NW-25 to NW-63, Stainless Steel Flange Size: ISO-KF NW-25 to ISO-LF NW-63 Common Dimensions: A = 1.77 (45mm), B = 0.86 (21.8mm)

Adapter KF-25 to ISO-80 Large Flange, Flange Size ISO-KF NW-25 to ISO-LF NW-80, Stainless Steel These adapters are KF-25 to ISO-80 large flange (LF). The flange size follows ISO standards and are NW-25 to NW-80. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter KF-25 to ISO-80 Large Flange, Flange Size ISO-KF NW-25 to NW-80, Stainless Steel Flange Size: ISO-KF NW-25 to ISO-LF NW-80 Common Dimensions: A = 1.77 (45mm), B = 1.00 (26mm)

Adapter KF-25 to ISO-100 Large Flange, Flange Size ISO-KF NW-25 to ISO-LF NW-100, Stainless Steel These adapters are KF-25 to ISO-100 large flange (LF). The flange size follows ISO standards and are NW-25 to NW-100. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter KF-25 to ISO-100 Large Flange, Flange Size ISO-KF NW-25 to NW-100, Stainless Steel Flange Size: ISO-KF NW-25 to ISO-LF NW-100 Common Dimensions: A = 1.77 (45mm), B = 0.86 (21.8mm)

Adapter KF-25 to ISO-160 Large Flange, Flange Size ISO-KF NW-25 to ISO-LF NW-160, Stainless Steel These adapters are KF-25 to ISO-160 large flange (LF). The flange size follows ISO standards and are NW-25 to NW-160. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter KF-25 to ISO-160 Large Flange, Flange Size ISO-KF NW-25 to NW-160, Stainless Steel Flange Size: ISO-KF NW-25 to ISO-LF NW-160 Common Dimensions: A = 1.77 (45mm), B = 0.86 (21.8mm)

Adapter KF-25 to ISO-200 Large Flange, Flange Size ISO-KF NW-25 to ISO-LF NW-200, Stainless Steel These adapters are KF-25 to ISO-200 large flange (LF). The flange size follows ISO standards and are NW-25 to NW-200. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter KF-25 to ISO-200 Large Flange, Flange Size ISO-KF NW-25 to NW-200, Stainless Steel Flange Size: ISO-KF NW-25 to ISO-LF NW-200 Common Dimensions: A = 1.77 (45mm), B = 0.86 (21.8mm)

Adapter, Straight Reducer, KF-40 to ISO-63 Large Flange, Flange Size ISO-KF NW-40 to ISO-LF NW-63, Stainless Steel These adapters are KF-40 to ISO-63 large flange (LF). The flange size follows ISO standards and are NW-40 to NW-63. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter KF-40 to ISO-63 Large Flange, Flange Size ISO-KF NW-40 to NW-63, Stainless Steel Flange Size: ISO-KF NW-40 to ISO-LF NW-63 Common Dimensions: A = 1.77 (45mm), B = 1.37 (35mm)

Adapter Conical KF-40 to ISO-63 Large Flange, Flange Size ISO-KF NW-40 to ISO-LF NW-63, Stainless Steel These conical adapters are KF-40 to ISO-63 large flange (LF). The flange size follows ISO standards and are NW-40 to NW-63. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter Conical KF-40 to ISO-63 Large Flange, Flange Size ISO-KF NW-40 to NW-63, Stainless Steel Flange Size: ISO-KF NW-40 to ISO-LF NW-63 Common Dimensions: A = 3.39 (86mm), B = 1.37 (35mm)

Adapter Straight KF-40 to ISO-80 Large Flange, Flange Size ISO-KF NW-40 to ISO-LF NW-80, Stainless Steel These straight adapters are KF-40 to ISO-80 large flange (LF). The flange size follows ISO standards and are NW-40 to NW-80. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter Straight KF-40 to ISO-80 Large Flange, Flange Size ISO-KF NW-40 to NW-80, Stainless Steel Flange Size: ISO-KF NW-40 to ISO-LF NW-80 Common Dimensions: A = 1.875 (47mm), B = 1.37 (35mm)

Adapter Conical KF-40 to ISO-80 Large Flange, Flange Size ISO-KF NW-40 to ISO-LF NW-80, Stainless Steel These conical adapters are KF-40 to ISO-80 large flange (LF). The flange size follows ISO standards and are NW-40 to NW-80. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter Conical KF-40 to ISO-80 Large Flange, Flange Size ISO-KF NW-40 to NW-80, Stainless Steel Flange Size: ISO-KF NW-40 to ISO-LF NW-80 Common Dimensions: A = 4.54 (118mm), B = 1.37 (35mm)

Adapter KF-40 to ISO-100 Large Flange, Flange Size ISO-KF NW-40 to ISO-LF NW-100, Stainless Steel These adapters are KF-40 to ISO-100 large flange (LF). The flange size follows ISO standards and are NW-40 to NW-100. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter KF-40 to ISO-100 Large Flange, Flange Size ISO-KF NW-40 to NW-100, Stainless Steel Flange Size: ISO-KF NW-40 to ISO-LF NW-100 Common Dimensions: A = 1.77 (45mm), B = 1.37 (35mm)

Adapter KF-40 to ISO-160 Large Flange, Flange Size ISO-KF NW-40 to ISO-LF NW-160, Stainless Steel These adapters are KF-40 to ISO-160 large flange (LF). The flange size follows ISO standards and are NW-40 to NW-160. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter KF-40 to ISO-160 Large Flange, Flange Size ISO-KF NW-40 to NW-160, Stainless Steel Flange Size: ISO-KF NW-40 to ISO-LF NW-160 Common Dimensions: A = 1.77 (45mm), B = 1.37 (35mm)

Adapter KF-40 to ISO-200 Large Flange, Flange Size ISO-KF NW-40 to ISO-LF NW-200, Stainless Steel These adapters are KF-40 to ISO-200 large flange (LF). The flange size follows ISO standards and are NW-40 to NW-200. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter KF-40 to ISO-200 Large Flange, Flange Size ISO-KF NW-40 to NW-200, Stainless Steel Flange Size: ISO-KF NW-40 to ISO-LF NW-200 Common Dimensions: A = 1.77 (45mm), B = 1.37 (35mm)

Adapter Conical KF-50 to ISO-63 Large Flange, Flange Size ISO-KF NW-50 to ISO-LF NW-63, Stainless Steel These conical adapters are KF-50 to ISO-63 large flange (LF). The flange size follows ISO standards and are NW-50 to NW-63. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter Conical KF-50 to ISO-63 Large Flange, Flange Size ISO-KF NW-50 to NW-63, Stainless Steel Flange Size: ISO-KF NW-50 to ISO-LF NW-63 Common Dimensions: A = 3.39 (86 mm), B = 1.87 (47 mm)

Adapter, Straight Reducer, KF-50 to ISO-63 Large Flange, Flange Size ISO-KF NW-50 to ISO-LF NW-63, Stainless Steel These adapters are KF-50 to ISO-63 large flange (LF). The flange size follows ISO standards and are NW-50 to NW-63. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter KF-50 to ISO-63 Large Flange, Flange Size ISO-KF NW-50 to NW-63, Stainless Steel Flange Size: ISO-KF NW-50 to ISO-LF NW-63 Common Dimensions: A = 1.77 (45mm), B = 1.80 (47mm)

Adapter Straight KF-50 to ISO-80 Large Flange, Flange Size ISO-KF NW-50 to ISO-LF NW-80, Stainless Steel These straight adapters are KF-50 to ISO-80 large flange (LF). The flange size follows ISO standards and are NW-50 to NW-80. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter Straight KF-50 to ISO-80 Large Flange, Flange Size ISO-KF NW-50 to NW-80, Stainless Steel Flange Size: ISO-KF NW-50 to ISO-LF NW-80 Common Dimensions: A = 1.875 (47mm), B = 1.875 (47mm)

Adapter Conical KF-50 to ISO-80 Large Flange, Flange Size ISO-KF NW-50 to ISO-LF NW-80, Stainless Steel These conical adapters are KF-50 to ISO-80 large flange (LF). The flange size follows ISO standards and are NW-50 to NW-80. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter Conical KF-50 to ISO-80 Large Flange, Flange Size ISO-KF NW-50 to NW-80, Stainless Steel Flange Size: ISO-KF NW-50 to ISO-LF NW-80 Common Dimensions: A = 4.64 (118mm), B = 1.87 (47mm)

Adapter Conical KF-50 to ISO-100 Large Flange, Flange Size ISO-KF NW-50 to ISO-LF NW-100, Stainless Steel These conical adapters are KF-50 to ISO-100 large flange (LF). The flange size follows ISO standards and are NW-50 to NW-100. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter Conical KF-50 to ISO-100 Large Flange, Flange Size ISO-KF NW-50 to NW-100, Stainless Steel Flange Size: ISO-KF NW-50 to ISO-LF NW-100 Common Dimensions: A = 4.64 (118mm), B = 1.87 (47mm)

Adapter KF-50 to ISO-100 Large Flange, Flange Size ISO-KF NW-50 to ISO-LF NW-100, Stainless SteelThese adapters are KF-50 to ISO-100 large flange (LF). The flange size follows ISO standards and are NW-50 to NW-100. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter KF-50 to ISO-100 Large Flange, Flange Size ISO-KF NW-50 to NW-100, Stainless SteelFlange Size: ISO-KF NW-50 to ISO-LF NW-100Common Dimensions: A = 1.77" (46mm), B = 1.87" (47mm)

Adapter KF-50 to ISO-160 Large Flange, Flange Size ISO-KF NW-50 to ISO-LF NW-160, Stainless Steel These adapters are KF-50 to ISO-160 large flange (LF). The flange size follows ISO standards and are NW-50 to NW-160. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter KF-50 to ISO-160 Large Flange, Flange Size ISO-KF NW-50 to NW-160, Stainless Steel Flange Size: ISO-KF NW-50 to ISO-LF NW-160 Common Dimensions: A = 1.77 (45mm), B = 1.87 (47mm)

Adapter KF-50 to ISO-200 Large Flange, Flange Size ISO-KF NW-50 to ISO-LF NW-200, Stainless Steel These adapters are KF-50 to ISO-200 large flange (LF). The flange size follows ISO standards and are NW-50 to NW-200. They are commonly used to make connections between ISO-KF and ISO-LF fittings. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant stainless steel. Adapter KF-50 to ISO-200 Large Flange, Flange Size ISO-KF NW-50 to NW-200, Stainless Steel Flange Size: ISO-KF NW-50 to ISO-LF NW-200 Common Dimensions: A = 1.77 (45mm), B = 1.87 (47mm)