Wide-View Solar Powered Welding Helmet, Flame Durable, lightweight material is and flame retardant. Ultra high performance filters protects against UV & IR . Automatically changes from a light to a dark state when arc is struck. Returns to normal when welding stops w/ dark to clear adjustments available . Variable shades from DIN 9 to DIN 13 . 3.86 x 2.17 Viewable Area . Outside sensitivity adjustments provides clear vision both prior and during welding . Special turnover headband mechanism allows for greater comfort and reduces fatigue. Utilizes high performance solar cells w/ 2 built-in 3V lithium batteries as power back-up. Complies with DIN, ISO, EN safety standards and ANSI Z87.1-2003 standards. Replacement Lenses: Part #41264 . Replacement Headgear: Part #41263. Switching Time: Light to Dark 1/30,000 of a second (0.0000.33 sec.) 41266 Yes - LEAD