Hobart Pro Series Variable-Shade Auto-Darkening Welding Helmet - Decomposition Style Graphics, Model# 770765 Largest in it&#39;s class 3.82in. x 2.36in. viewing area Superfast switching speed (1/30,000 second reaction time) Auto on/off for convenience 4 independent arc sensors for reliable out-of-position applications New Ultra-Comfort adjustable ratcheting headgear with gel pad provides a great fit