DUST CAP, SOCKET, BODY MATERIAL ALUMINUM, TYPE DC, COUPLING SIZE 1 1/2 IN, FEMALE, CONNECTION TYPE FEMALE COUPLER, MAX. WORKING PRESSURE @ 70 F 250 PSI, SOCKET INSIDE DIAMETER 2 1/8 IN, GASKET MATERIAL NITRILE, OVERALL LENGTH 2 31/64 IN, INCLUDES LOCKING ARM YES