Check Ball, Compatible with Grainger Part Number 6CCN2, 6CCN3, 6CCN8, 6CCP0, 6CCP2, Compatible with Manufacturer Model Number PD15A-AAP-AAA, PD15A-ACP-AAA, PD15A-ASS-AAA, PD15P-FPS-PAA, PD15P-YPS-PAA, Material Santoprene, Product Type Check Ball, Compatible with Pump Type Diaphragm Pump, Compatible with Series Expert-Series, Compatible with Brand ARO