Pex-Al-Pex Pipe Material: PE,PEX,PERT,AL Dimension: 16mm-32mm Color: White, Yellow, Red Standard: ASTM F1281/ASTM D1282 PEX-AL-PEX Pipe1, Non ... low temperature and long service life. 2, Fluid resistance inside pipe is small, not easy scaling, fluid not being polluted, ... diameter. 3, 100% insulating oxygen,stop oxygen's penetration. Aluminum-plastic pipes can be used as shielding of communications lines ...