... +aluminium pipe moulds.....applys in ppr welding machine for 16mm pipe and fittings,goods in stock This kind of mould(socket) applys in plastic pipe welding ... .the size is 16mm. This kind of mould(socket) applys in plastic pipe welding machines, which is made of Aluminium alloy, and ... , D32mm, D40mm, D50mm, D63mm,D75mm,D90mm, D110mm.D160mm 16mm teflon pipe moulds