From HEMSCO SUPPLY, these Oxy-Acetylene Welding Goggles feature two 50 mm round #5 shade hardened eye-pieces, ensuring you get optimal protection. The soft vinyl around each eye-piece allows for a comfortable fit over regular eyeglasses, making these goggles a practical choice for any welder. Meeting ANSI Z87.1 Safety Standards, they are specifically designed for gas welding only. To maintain clarity and protection, Forney ITEM#'s 56900 (shaded) and 56901 (clear) replacement 50 mm eye-pieces are available.