Model: 990-SG NO. 11

Special Features:

With the filter turned off, the automatic filter provides filtration equivalent to a shade of not more than four shades lighter than the fixed filter shade. In the event of electronic failure, the filter will still provide this degree of protection. When the arc is struck, the filter automatically darkens, in 1/500 of a second, as long as the arc is lit. When the arc is extinguished, the filter reverts to the light phase to facilitate weld cleaning.

Properties:

A loose-fitting, single-aperture mask supported on the head by a headgear or headband. It is designed to protect the wearer's eyes, ears, neck, and head during welding operations. It may be furnished without filter glass and cover glass. Excludes faceshield, industrial.