1. dedicated DN40-2000mm for DI, carbon steel, HDPE, PVC, FRP, GRP, others required 2. Universal (wide range) DN50- 600mm 3. stepped ( equal DN, different OD; or different DN & OD) dedicated ( joint only suite for one kind of pipe OD) universal (wide range) . Material: ductile iron ï¼?DIï¼?; standard: ISO2531,BS EN545, BS EN598, AWWA C219, AWWA C110, ASME B16.42; FBE coating; suitable medium: potable waterã??drainageã??sewageã??waste water; suitable tempreture: -40°ï½? 125°; packing: plastic film plus pallet; origin: China.