The CIGWELD Hose Connection Kit LH, Screw Type, 5mm is a durable gas hose fitting designed to create a secure, leak-resistant connection for 5mm internal diameter hoses in oxy-fuel applications. Built in a left-hand screw type with a 5/8"-18 UNF LH thread, it is made from high-quality material for dependable performance and is well suited to welding and cutting setups that require safe, reliable hose connections.