Ball Valve with Lockable Device 1Diameter:1/4''-4'' 2Pressure ... 150. 300.600LB 3Material:WCB.304,306,304L,306L Ball Valve with Lockable Device DescriptionMaterials WCB.304,306,304L,306LNominal ... kinds of Pipeline Materials to oil field and refinery as Steel Pipes, Pipe Fittings, Flange, Valves, Gasket, Petroleum Machinery, ... with us and create a bright future together Ball Valve with Lockable Device