Inner Diameter = 5mm Outer Diameter = 11mm Material = EPDM Suitable Applications = Argon Length = 25m 색상 = Black Reinforced = Yes Inner Material = EPDM Black, flexible welding hose for argon. For use in industrial argon-welding applications. Specially developed to prevent moisture from permeating into the hose from the outside. A very strong, non-porous weld is thus achieved