Coupling, Valve Parts, Pump Parts manufacturer / supplier in China, offering Genuine High Performance Medium Pressure 600 Psi 26.9mm/3/4 Inch 0.75 Inch Stainless Steel Grooved Couplings, Sufficient Stock Factory Outlet Large Size 323.9mm/12 Inch Low Pressure 350psi Stainless Steel Flexible Couplings, Wholesale Price 42.4mm/DN32 High Pressure Grooved Coupling Clamp for Pipe Systems RO System and so on.