Carbon Steel Cap, Carbon Steel Concentric Reducer, Sockolet manufacturer / supplier in China, offering Seamless Malleable Cast Iron Stainless Steel Pipe Fitting Butt Welding Concentric Reducer, Essentric Reducer Butt Welding SUS A403gr. Wp304-S (seamless) 12" X 10" X Sch40s (heat treatment), Factory Wholesale Stainless Steel 304 316L 45 90 180 Degree Seamless Elbow Butt Weld Reducer Tee Pipe Fitting for Shipbuilding and so on.