... large output and long life cycle, high quality 1. draining pipe mould structure uses advanced technology of multi-cavity, multi-flow ... –lasting stability.2.usages: threading tubes,water-supply pipe, draining pipe, gas pipe, telecommunications pipe, land warming pipe, etc.3. types: stent style and co-extrusion ... ,φ25,φ32,φ40,φ50,φ65---φ630 and so on.5. draining pipe material: PVC, PE, PPR, etc.