Check Ball, Compatible with Grainger Part Number 2P600, 3FPR1, 6CCP8, Compatible with Manufacturer Model Number 666250-G22-C, PD20A-AAP-GGG-B, PD20A-AAP-GGG-G, Material Buna-N, Product Type Check Ball, Compatible with Pump Type Diaphragm Pump, Compatible with Series Expert-Series, Compatible with Brand ARO