The Forney 56800 replacement 4 1/4" x 2" clear plastic welding helmet cover lens is a high quality material that offers superior protection from dust, weld spatter and impact. 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. 4 1/4 inch (107.95 mm) x 2 inch (50.8 mm) welding helmet cover lens. Meets ANSI Z87.1 Safety Standards. Fits Forney 55663, 55666 and 55680. Proof of purchase required. neglect, negligence or accident, or that has been used in any way contrary to the purpose intended.