These kits are for the Danielson 280250 dry diaphragm vacuum pump. These includes the items needed to rebuild two 280250 diaphragm pumps. This kit does not include the diaphragm pumps motor bearings which are needed if the diaphragm pump is becoming increasingly noisy. This kit sold as one each, pump not included. Please contact us for diaphragm pump rebuild service if diaphragm pump bearings are needed at (505) 872-0037.