Instapark ADF Series GX-500S Solar Powered Auto Darkening Welding Helmet with Adjustable Shade Range #9 - #13 (Blue) 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 Large 3.63X1.65 viewing area with variable shade adjustment from #9 -#13, 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