This outside protection plate replaces worn or damaged plates for the Speedglas 9100 series welding helmet. A must-have item, clean and maintain regularly to protect the glass from metal sparks and spatter. Features and Benefits: Easy to fit for a quick changeover and reduced downtime. Simple to clean with a soft cloth to extend product life. Economically priced to protect welding equipment and improve safety. Notes: Failure to use a protection plate will void the warranty of your welding filter should the glass become contaminated with sparks or splatter.