Repair Kit, Check Ball Material PTFE, Compatible with Grainger Part Number 6CCN4, 6CCN9, Compatible with Manufacturer Part Number PD15A-AAP-FTT, PD15A-ASS-STT, Diaphragm Material PTFE, Number of Check Balls 4, Number of Diaphragms 4, Number of O-Rings 16, Number of Seals 20, Valve Type Ball, Product Type Fluid End Repair Kit, Media Intake Pressure (Maximum) 120 psi, Compatible with Pump Type Air Operated Double Diaphragm Pump, Includes Balls, Diaphragms, O-Rings, Seals