The Speedglas 9100 outside cover lenses protect the outside of your Speedglas 9100 auto-darkening filter from sparks and spatter, they are essential for the care and maintenance of your Speedglas auto-darkening filter. Failure to use an inside protection plate with the filter voids the warranty if spark or spatter cause damage to the glass.
77092 Standard front cover lens for all Speedglas 9100 range of welding helmets, meets EN 166 1BT, - 3M part number 526000
77165 Scratch Resistant front cover lens for all Speedglas 9100 range of welding helmets, meets EN 166 1BT, - 3M part number 527000
77166 Heat Resistant front cover lens for all Speedglas 9100 range of welding helmets, meets EN 166 1BT, - 3M part number 527070
77177 Extra Scratch Resistant front cover lens for all Speedglas 9100 range of welding helmets, meets EN 166 1BT, - 3M part number 527001
