Air End Repair Kit, Compatible with Grainger Part Number 2CAV1, Compatible with Manufacturer Model Number 650718-C, 650719-C, 666100-3EB-C, 666150-3EB-C, 6661A3-344-C, 6661A3-34B-C, 6661U3-311-C, 6661U3-344-C, 6662B3-311-C, 6662B3-344-C, Includes Air Valve Retaining Rings, U-Cups, Product Type Air End Repair Kit, Compatible with Series PRO, Compatible Connection Media Type Air, Compatible with Pump Type Air Operated Double Diaphragm Pump, Number of Gaskets 2, Number of O-Rings 21