Diaphragm Check, Compatible with Grainger Part Number 6CCN7, 6CCP6, 6CCP8, 6CCR1, 6CCR2, 6CCR4, 6CCR5, Compatible with Manufacturer Model Number PD20A-AAP-AAA-B-G, PD20A-AAP-GGG-B-G, PD20A-AAP-SST-B-G, PD20A-ACP-AAA-B-G, PD20A-ASS-AAA-B-G,...