PERT/AL/PERT strong anti-oxidation, anti-ultraviolet,anti-lekage special size:1520X2.5 1925X3.0 MULTILAYER PIPE:PERT-AL-PERT PIPEPERT-AL-PERT FITTING1. Five layers: pert, hot melt adhesive ,aluminum, hot melt adhesive ,pert2.OVERLAP AND BUTT-WELDEDNumber Specification wall Thickness Packingsf6001 1216mm 2.0mm 100msf6002 1620mm 2.0mm 100msf6003 2025mm 2.5mm 100msf6004 2026mm 3.0mm 100msf6005 ...