Coupler x female npt/bspt Material : (1)body: aluminium alloy (2)handle :brass (forging) (3)ring : steel ( zinc plated ) (4)pin : steel (zinc plated ) (5) safty clip : steel ( zinc plated ) (6)gasket : nitrile rubber Sizes: 1/2, 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2, 3, 4, 5, 6 Standard: din en 14420-7-2005 Cast method available : gravity cast, sand cast Processing : cnc machining Feature : (1) precisely machined for accurate fit , join fast and save effort. (2)recess holds gasket firmly in place assuring proper placement . (3)smooth face of groove and great resistance to vibration . (4) working pressure is 1.6mpa and strength test pressure is 2.4mpa Packing: international seaworthy packaging, or according to customers' requirements