The transparent cover protects the automatic dimmer lens from scratches and damage. Change lens cap regularly to ensure the best working condition, cleaning and protection. Remove the protective film on both sides before use Size: 4 x 2 inches (101 x 50 mm) Application: Welding Material: PC Packaging Content: 10 Protective Plate 10 pack transparent cover lens for welding helmet Suitable for standard 3/11 welding helmet lens filter In order to make your helmet more suitable for welding, the lens cap should be replaced when necessary. Before installing it on the helmet, Remove the protective film on both sides before use. Size: 4 x 2 inches (101 x 50 mm)