Material: ductile iron (DI). Standard: ISO2531, BS EN545, BS EN598, AWWA C219, AWWA C110, ASME B16.42. FBE coating. Suitable medium: potable water, drainage, sewage, waste water. Suitable tempreture: -40centigrade degree - 125centigrade degree . Packing: plastic film plus pallet. Origin: China. Dedicated DN50-2000mm for DI, carbon steel, HDPE, PVC, FRP, GRP, others required. Universal (wide range) DN50- 600mm. Stepped ( equal DN, different OD; or different DN & OD) dedicated ( joint only suite for one kind of pipe OD) universal (wide range).