Description The Lincoln Electric 2 in. 4-1/4 in. Clear-Cover Lenses (3-Pack) are made from hard polycarbonate that resists breakage and abrasion damage. They help extend the life of your helmet. They are also useful in helping protect against hazardous welding rays. Exceeds the high velocity and high impact requirements. Standard size replacement cover lens for helmets requiring a 2 in. x 4-1/4 in. lens. Installs easily, Professional welders replace their out of date solder lugs with power cable lugs.