RELIABLE MATERIAL- Type: Oxygen-Barrier; Color: Red; Nominal Diameter: 3/4'; Total Length: 500ft. Outside Diameter: 0.86'; Inner Diameter: 0.66'; Tube Thickness: 0.1'; Keep quick & constant hot/cold water flows. Made of PEX material, non-toxic, crack-resistant, leak-proof. Perfect for potable water or radiant floor water use. ROBUST O2 RESISTANT- Unique EVOH layer, stop O2 into the tube, protect metal components from corrosion. Heating system's service time can be greatly lengthened. Smooth inner pipe, anti- scaling quality, increase heat dissipation efficiency & speed for energy-saving. EFFORTLESS INSTALLATION- Compatible with different connection system & floor type, such as: Crimp connection system (crimp tool + crimp rings + crimp fittings); Cinch (clamp) connection system (cinch tool + St. steel clamps + crimp fittings); Press system (by Viega); Compression PEX Fittings. PREMIUM FLEXIBILITY- Min