... and ousite layers are made of PPR, tightly bonded with PP-based adhesive to the mid-layer of aluminum foil, which ... . It is a kind of perfect combination of metal pipe and plastic pipe. Features: Material: Polypropylene & Aluminum foilPressure Rating: 1.0, ... , AENORColor:Green,White,Grey etc Applications:cold or hot water supply, heating system including flooring heating, wall heating and radiant, ...