Features: 2 types for option, the red tubing is for transporting oxygen and the blue one for transporting acetylene. For industrial use, mainly used for transporting oxygen/ acetylene to welding and cutting equipment. Made of high quality material, 8mm diameter, thick and wear resistant. Soft but with good tensile strength. With 3 layers, braided with crossing lines inside, not easy to come unglued. Resistant to high working pressure, resistant to low and high temperature, anti burst. Note: Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding.