Malleable Iron Pipe Fittings, Grooved Pipe Fittings, Pipe Hangers manufacturer / supplier in China, offering Ductile Iron Grooved Fittings Mechanical Cross Threaded Outlet, Ductile Iron Grooved Fittings Mechanical Cross Grooved Outlet, Ductile Iron Grooved Fittings Mechanical Tee Threaded Outlet and so on.