stainless steel precision investment casting CNC machined, easy to connect and disconnect Size: 1/2" -- 6"Body: Stainless Steel 304 / 316Gasket: NBR, Viton, TelfonSpec. MIL-C27487Test Pressure:3/4"--2" 250PSI (17.6 bar) 3"--4" 200PSI (14.8 bar) 2 1/2" 225PSI (15.8 bar) 6" 150PSI (10.5 bar)Application: Oil, Petroleum, Chemical, Water, Gas Industries. camlock coupling -C type