Welding helments auto-dark fire design & logo Variable shade #9 - 13 auto-darkening, with 3.86 inches (98.04mm) x 2.17 inches (55.12mm) viewing area and four optical sensors. Outside mounted shade selector knob and sensitivity adjustment. Internal welding and grinding switch, delay switch (short, middle, and lon g) and battery/shade Test Control. UV/IR protection: Up to shade DIN 16 continuous. Light state: Shade DIN 4; Variable shade: DIN 9 to DIN 13. Power supply: Solar cells with built-in replaceable 3V lithium batteries. Switching time light-to-dark: 1/30,000 th of a second after arc is struck. Switching time dark-to-light: 0.25 second in"short" mode, 0.8 second in"long" mode. Constructed of a lightweight impact resistant nylon shell and is equipped with a geared headband mechanism. Meets related DIN, ISO and EN Safety Standards and ANSI Z87.1 Safety Standards.
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