The Miller Electric Inside Lens Cover Classic is a replacement lens cover for Miller welding helmets. It is made of impact-resistant polycarbonate for durability. The lens cover protects the auto-darkening lens inside the welding helmet from sparks, spatter, and debris. It measures 9.25 x 5.25 inches and is compatible with Classic, Digital Elite, Digital Infinity, and other Miller helmets. The Inside Lens Cover Classic provides an economical way to protect your helmet's delicate electronics.