3M™ Speedglas™ Outside Protection Plates are designed for use with 3M™ Speedglas™ Welding Helmets and Filters and protect the welding filter from sparks and spatter.3M™ Speedglas™ Outside Protection Plates are a replacement part designed to be used when the original has been damaged or worn out. Help protect your welding filter from sparks and spatter by ensuring that your Outside Protection Plate is functioning properly.