These kits of repair parts are designed for 3/16" I.D. twin welding hoses with 3/8"-24 Type “A” Connectors Machined in high quality brass rated for 200 psi. Comply with CGA standards for Oxygen and Acetylene/Propane gases. Choose from the different repair kit options; Couplers, Connectors, Barbed Splicers, Connectors + Couplers, Connectors + Splicers, Connectors + Couplers + Splicers. with the dimensions and compare with your welding hose to make sure it is 3/16” I.D. with 3/8"-24 Type “A” Connectors. These kits won't work with smaller or larger hoses and connectors. These kits allow you to connect and repair your worn, leaking, or damaged twin welding hoses, A ferrule crimper will be needed for those kits that include ferrules.