This extended-length acetylene hose features a 10mm inner diameter for adequate flow. The 20m length provides exceptional reach for large work areas. Includes factory-installed 3/8" check valve for safety. The red color-coded outer jacket identifies acetylene service. Rated for 300psi working pressure with a 4:1 safety factor. The textile reinforcement provides strength without sacrificing flexibility. Ideal for large-scale oxy-acetylene welding and cutting setups. The check valve prevents dangerous backflow of gases. Meets ISO 3821 standards for welding hoses. A reliable solution for industrial welding applications requiring extended reach.