... +aluminium pipe moulds.....applys in ppr welding machine for 16mm pipe and fittings,goods in stock This kind of mould( ... welding machines, is made of Aluminium alloy.the size is 16mm. This kind of mould(socket) applys in plastic pipe welding ... D20mm, D25mm, D32mm, D40mm, D50mm, D63mm,D75mm,D90mm, D110mm.D160mm 16mm teflon pipe moulds