Adaptor x female npt/bspt Material : aluminium alloy 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 Gasket : nitrile rubber 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