The Lincoln Electric KP3044-1 VIKING 3350 Inside Cover Lens 5 Pack is a set of clear polycarbonate lenses designed for welding helmets. Made by Lincoln Electric, these lenses are specifically for the inside cover of the welding helmet, providing protection and visibility during welding processes. The pack includes 5 units, each manufactured in China. These lenses are equipped with a California Prop 65 Warning for safety information. Ideal for welding professionals, these lenses offer quality and durability in a work environment that requires precision and safety.