... Malaysia, Indonesia, Russia, Ukraine, VietnPPR-AL-PPR Plastic Composite Pipes with Aluminum as Inner Part, Working ... Key Specifications/Special Features:Aluminum composite pipeMaterial: PPR, aluminmumWith five layers, inside and outsideTightly ... of gas/oxygen tightAdvantages of both metal and plastic pipes, but eliminates their own disadvantagesReduce linear ... in the middle aluminum plastic ppr pipe