K-T Industries' 2" x 4-1/4" Clear Glass Cover Lens provides essential protection for your welding helmet's more expensive filter plates, helping prevent costly pitting and scratches during demanding jobs. Made from durable glass for reliable clarity, it should be replaced immediately if damaged to ensure optimal visibility and personal safety, though using plastic lenses is recommended whenever possible. Designed to fit standard 2" x 4-1/4" openings, this cover lens offers a simple, effective way to extend the life of your equipment and maintain a safer work environment. | K-T Industries 2" x 4-1/4" Clear Glass Cover Lens