Hobart's Discovery™ auto-darkening replacement welding lens (770762) is for your Discovery series welding hood. The variable shade lens is adjustable from shade #9-13 and is suitable for MIG, Flux-Cored and Stick welding. The Discovery Series replacement welding lens has a large 6.91 square inch viewing area and features 2 independent arc sensors and 1/12,000 reaction time. The Discovery Series lens also includes external controls for weld and grind modes, sensitivity and delay controls, low battery indicator, and an auto on/off feature. For Hobart Discovery series welding helmets ONLY.