The Speedglas 9100 standard outside protection plate is designed to protect the filter from spark and spatter. Failure to use an outside protection plate with the filter voids the warranty if spark or spatter contaminates the glass.
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.