3M 776000 100 Series Outer Protection Plate 10 Pack. Features: The Speedglas 100 outer protection plate is designed to protect the filter from sparks and debris. If no outer protection plate is used with the filter, the warranty will be void if the glass gets contaminated by sparks or splashes. The plate should be replaced when deeply scratched or when it becomes dirty. If dirty, clean with a soft cloth or lens paper. Compatible products: Speedglas 9100, Speedglas 9100 Air, Speedglas 9100-QR.