... ,18mm-2,20mm-2, 25mm-2.5,32mm-3.0 Aluminum plastic composite pipe:Five layer( PEX-adhesive agent-continuously overlapped welded ... aluminum-adhesive agent -PEX)For general plumping ,underfloor heating ,radiator-connection ... applications.Packing: 100 meters or 50 meters in one roll. Aluminum plastic composite pipe