1. dedicated DN50-300mm for DI, carbon steel, HDPE, PVC, FRP, GRP, others required 2. Universal (wide range ) DN50- 600mm . 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: -40� 125�; packing: plastic film plus pallet; origin: China.