The Speedglas 9100X, dark shades 8-13, sensitivity adjustment allows use with all Stick, MIG and TIG processes, also has grinding and torch cutting modes. All new headgear makes this helmet extremely comfortable and versatile. Viewing area 9.12 sq in. Benefits 2.1 x 4.2 in. viewing area New comfortable headgear Sensitivity adjustment that allows use with all Stick, MIG and TIG welding processes, with grinding and torch modes.