Welders, protect your expensive auto-darkening lens with these clear cover plates! This pack of 10 clear protective lenses is brand new and unused, in original packaging. Each lens measures 4.5 by 3.5 inches, a common size for many welding helmets. MPN is we12, from prolineppi brand. They fit over your main welding lens to block spatter, scratches, and debris. When a cover gets dirty or pitted, you just peel it off and replace it with a fresh one – saving your primary lens from damage. Having 10 pieces means you're set for a long time. It's a simple, cheap way to maintain clear vision and extend the life of your helmet. Safety and visibility are everything in welding. Don't weld with a scratched-up lens that obscures your view. Keep a stack of these on hand and always weld with a clear protective shield. An essential consumable for any workshop.