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
