5 m flexible hose with factory pre-crimped w21.8 and r3/8 in left-hand thread connections on both ends, preventing assembly errors and reducing the risk of accidental leaks, manufactured with highly resistant materials to pressure, weather aging and chemical agents, ensuring excellent flexibility, safely connects portable welding equipment or burners to gas cylinders, provides greater freedom of movement and a wide radius of maneuver in work areas, workshops or industries, reducing the need to constantly move the gas cylinder