3M™ Speedglas™ Welding Filter 9100 Series continues 3M’s tradition of outstanding optical quality, including uniform shading and minimal distortion across the entire filter viewing area. The welding filter 9100XXi has seven variable dark shades (5, 8 and 9-13) for most types of arc welding and a viewing area of 73×107 mm, made for the professional welder. 3M™ Speedglas™ Natural Colour Technology gives you high contrast and more natural-looking colours. The delay function sets the dark-to-light opening time, and it’s possible to lock-in any shade, e.g. in light state 3 when grinding. The slim profile and ergonomic design make it even more lightweight and easier to get into tight welding spaces.