the fitting is our patent product which replace the brass fittings for pex pipe connector.

the aluminum-plastic compound tube's inner and outer layers are both of PE, clean, non-pollutant, smooth. thermo-melt layer and inner PE layer are copressed and bonded into one together  at a step.its midlayer of aluminum can 100% anti-leakage of gas with all of metals' strong points and with out any of their weak points.