Welding Goggles, 'Eye-piece Type', Features two separate 50mm round #5 shade hardened eye-pieces. Equipped with cover lenses. Folds up to pocket size for storage and carrying. Meets ANSI Z87.1 Safety Standards. DESIGNED FOR GAS WELDING ONLY. Forney 56900 (shaded) and 56901 (clear) replacement 50mm eye-pieces are available separately. Provides 99.9% UV protection.