Diaphragm Pump Repair Kit, Check Ball Material PTFE, Compatible with Grainger Part Number 6CCN6, 6CCR2, Compatible with Manufacturer Model Number PD20A-AAP-STT-B, PD20A-ASS-STT-B, Diaphragm Material PTFE, Number of Check Balls 4, Number of Diaphragms 4, Number of O-Rings 8, Number of Seals 14, Valve Type Ball, Product Type Fluid End Repair Kit, Media Intake Pressure (Maximum) 120 psi, Compatible with Pump Type Air Operated Double Diaphragm Pump