... company specializing in the production of PVC tube, PVC conduit, PVC conduit, garden water pipe, air ducts, gas pipe, water pipe, tube ... , fire, water bath, conduit, winding, auto water pipe, QiCheLian over, feed, transparent pipe, PVC ... by SGS certification and already Intertek environmental authentication.3.New PVC materials, products and strong, water-proof layer, non ...