Duckbill Kit, Check Ball Material Neoprene, Compatible with Grainger Part Number 6CCK1, Compatible with Manufacturer Model Number PD03P-APS-0NA, PD03P-ARS-0NA, PD03P-BRS-0NA, Diaphragm Material Santoprene, 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