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the products of DanQing have long-lasting durability,which make sure of satisfying you,it is your best OEM choice. We always adhere to the principe of “quality first and customers first”,we can offer you the products of the best quality and the most competitive price and the best service in time.This kind of mould(socket) applys in plastic pipe welding machines, is made of Aluminium alloy.the size is 20mm-63mm.This kind of mould(socket) applys in plastic pipe welding machines, which is made of Aluminium alloy, and covered with American famous coatings Teflon, to protect the plastic pipes from adhering when welding the pipes