The Forney 57052 replacement 5 1/4 inch x 4 1/2 inch #10 shaded lens for helmets. Fits most brand name helmets. Forney Industries is one of Americas longest operating family-owned metal working product companies. Founded in 1932, Forney offers more than 5,000 products for the hardware, automotive, farm and ranch and do-it-yourself markets. If you've got metal working questions, we've got answers. Were committed to your success regardless of location size or needs. Replacement 5 1/4 inch (133.35 mm) x 4 1/2 inch (114.3 mm) hardened #10 welding lens. Meets ANSI Z87.1 Safety Standards. Fits Forney 55647, 55669, 55672, 55673, 55684 and 55686.