Description : JSS200N 93 x 43mm Solar Auto Darkening Welding Helmet Lens Goggles Suitable for most kinds of welding mods. When arc is struck, Auto- darkening Filter will turn from clear state to dark state, response time is less than 1/10000S. With non-grade adjustable shade number from DIN9-DIN13 The high performance of Auto-darkening Filter provides to the user’s eyes and face a full protection against UV and IR radiation during the entire welding process,even in the clear state.