3M 536200 9100 Inner Headband Rear Part Features Speedglas Rear Headband 9100 is a replacement part and is used only to replace the rear part of the headband when the original parts wear out or get damaged. Welding Accessory Plate marking 117x50. For maximum safety and comfort, make it a habit to regularly check your equipment. Replace worn or damaged parts. Compatible Products Speedglas 9100, Speedglas 9100 Air, Speedglas 9100 FX, Speedglas 9100 FX Air