Suitable for use with oxygen-acetylene only. 1/4" (6.35mm) x 50' (15.24m). Red hose for acetylene. Green hose for oxygen. Use with acetylene fuel gas only. Resists kinks, heat, weather and solvents. Bleed hoses when not in use for at least 30 minutes. Couple with one inch ferrules only. Includes standard "B" fittings.