The Forney 55320 lift front gas welding goggles have #5 shade lenses. Conforms comfortably to the head and allows ample room to fit over regular eye glasses. Designed for gas welding only. Forney Industries is one of America's 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. We're committed to your success regardless of location size or needs. 2-inch (50.8 mm) x 4-1/4 inch (107.95 mm) #5 shade hardened lens with clear glass cover lens. Meets ANSI Z87.1 Safety Standards. Proof of purchase required. neglect, negligence or accident, or that has been used in any way contrary to the purpose intended.