The body metal is made of brass and the surface is nickel plated. The plastic body is black. Use hose: PU pipe, nylon pipe. When the pipe is disconnected, the gas is completely blocked. When the pipe is re-inserted and safe, the gas can flow and be controlled after the pipe is pulled out. The hand operated air valves are used to control the opening and closing of air pressure in pneumatic devices. When the equipment needs to be checked and maintained, the residual pressure can be released by the hand operated air valve.
