Instapark ADF Series GX-800S Solar Powered Auto Darkening Weld Grind Selectable Welding Helmet with Adjustable Shade Range 9-13 Solar-powered welding helmet with auto-darkening filter switching from light to dark in 1/25000 sec Improved optics for 1/2/1/3 denomination to deliver optimum optical clarity to minimize eye fatigue Extra-large 4X2 viewing area with variable shade adjustment from #9 -#13 a resting shade of #4 Suitable applications include Stick (arc welding), MIG (Metal Inert Gas) TIG (Tungsten Inert Gas) In conformance with GS, DIN-Geprft, CE, ANSI Z87.1, CSA Z94.3, AS/NZS standards