This kit is for the Danielson 280250 dry diaphragm vacuum pump. It 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 is 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.