3M™ Speedglas™ Inner Protection Plates are replaceable spare parts for 3M™ Speedglas™ Welding Helmets and are designed to protect the welding filter. 3M™ Speedglas™ Inner Protection Plate is a spare part for the 3M™ Speedglas™ Welding Helmet that protects the welding lens from spark and welding spatter. Replace when 3M™ Speedglas™ Inner Protection Plate becomes damaged or too dirty to clean. Regularly clean with a lint-free tissue or cloth, for example the 3M™ Cleaning Wipe. For maximum safety and comfort, regularly check your equipment for worn or damaged parts.