Diaphragm Pump Repair Kit, Check Ball Material Acetal, Compatible with Grainger Part Number 2P599, Compatible with Manufacturer Model Number 666150-162-C, 666150-362-C, 666152-362-C, 666170-362-C, Diaphragm Material Buna-N, Number of Check Balls 4, Number of Diaphragms 2, Number of O-Rings 9, Number of Seals 9, Valve Type Ball, Product Type Fluid End Repair Kit, Media Intake Pressure (Maximum) 120 psi, Compatible with Pump Type Air Operated Double Diaphragm Pump