ArcOne Super Singles 240 Auto-Darkening Filter 2-Inch x 4-1/4-Inch x .25-Inch is the first 2x4 filter specifically designed for Tig welding with features such as sensitivity and delay only available in more costly products. An additional grinding mode negates the need for a more costly flip front helmet. The Super Singles comes with a dark state of 10.5 and a light state of 2.5, is completely solar powered so there are never any batteries to change, water and dust resistant, and up to shade 16 UV/IR protection. This filter features a 5.25 square inch active viewing area and switching speed of 0.5 milliseconds.