1.Advanced equipment 2.experienced engineer,Strong R & D team 3.19 years of specializing in produce of pipe fittings. full coupling Manufacturer of forged steel pipe fittings,such as elbow,tee,cross,coupling,nipple,plug,union,plug.... stainless steel quick couplingJINYOU stainless sleeve pipe fittings1. Very easy of installing. 3. Perfect watertightness, Anti-rust, leak-proof water, good strength ...