Diaphragm Pump Repair Kit, Check Ball Material Santoprene, Compatible with Grainger Part Number 5U663, 5U669, Compatible with Manufacturer Model Number 650762-3EB, 666053-2EB, 666053-3EB, 666057-4EB, 66605H-6EB, 66605J-2EB, 66605J-3EB, 66605K-4EB, Diaphragm Material Santoprene, Number of Check Balls 4, Number of Diaphragms 2, Number of O-Rings 11, Number of Seals 11, Valve Type Ball, Product Type Fluid End Repair Kit, Media Intake Pressure (Maximum) 120 psi