These kits are for the Danielson 280200 dry diaphragm vacuum pump. The kit includes the items needed to rebuild the diaphragm pump. This kit does not include the diaphragm pump 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.