Diaphragm Pump Repair Kit, Check Ball Material Hytrel, Compatible with Grainger Part Number 55HE90, Compatible with Manufacturer Model Number PD07P-APS-PCC, Diaphragm Material Hytrel, Number of Check Balls 4, Number of Diaphragms 2, Number of O-Rings 6, Number of Seals 8, Valve Type Ball, Product Type Fluid End Repair Kit, Media Intake Pressure (Maximum) 120 psi, Compatible with Pump Type Air Operated Double Diaphragm Pump, Compatible with Brand ARO, Includes Balls, Diaphragms, O-Rings, Seals WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov -