Pump Repair Kit, Check Ball Material PTFE, Compatible with Grainger Part Number 15U534, Compatible with Manufacturer Model Number S20B3P2PPUS000, Diaphragm Material PTFE, Number of Check Balls 4, Number of Diaphragms 2, Number of O-Rings 0, Number of Seals 12, Valve Type Ball, Product Type Fluid End Repair Kit, Media Intake Pressure (Maximum) 100 psi, Compatible with Pump Type Air Operated Double Diaphragm Pump, Compatible with Brand Sandpiper, Includes Check Balls, Diaphragms, Gaskets, Seals