Grade R Single Line Welding Hose, 1 2 in, 100 ft, CC Fittings, Oxygen, Green ORS NASCO Designed for use in applications Designed for use in applications where the contrast in color between the part being tested and the magnetic particles being used is insufficient for reliable identification of flaws Composed of acetone and inorganic pigments and utilizes a carbon dioxide aerosol propellant for ease of application Can be used with both dry and wet method magnetic particles spring loaded release mechanism prevents ratchet from opening accidentally High quality Grade R single line welding hoses Grade R welding hoses are designed for carrying acetylene or oxygen to welding equipment Green hose carries oxygen to welding equipment Red hose carries acetylene Hose cover resists oils