1,Raw material Material: SK 2,Factory PERT Fitting1,Size:S16 S18 S20 S25 S322,Application:1. Ground heating system, it is suitable for such heating as the living room, bedroom, public bathroom, swimming pool, kindergarten, nursery and the old people's house2. Building cold and hot water supply, drinking water system3. Such fluid transportation pipelines as the beverage, milk, etc. in food ...