Protect your Speedglas welding filter series 9100 from sparks and spatter with 3M Speedglas Outside Protection Plate 9100, 526000. Our spare part replaces your original protection plate if it becomes worn or damaged. Regularly clean with a soft cloth and replace if any pits or scratches occur. Failure to use an outside protection plate with the filter voids the warranty if sparks or spatter contaminate the glass. Pack of 10.