3M Inner Protection Plate 9100X 528025 Features: Speedglas inner protection plate 9100X is designed to protect the inner surface of the filter from sparks and debris. If no inner protection plate is used with the filter, the warranty will be void if sparks or splashes damage the lens. 5-pack. Regularly clean with a soft cloth, and replace if pits or scratches occur. Plate dimensions 117x77. Suggested Industries / Usage: Speedglas 9100, Speedglas 9100 Air, Speedglas 9100 FX, Speedglas 9100 FX Air, Speedglas 9100 MP, Speedglas 9100 MP-Lite