3M? Speedglas? 1.5X magnifying lens for the complete Speedglas? range of welding helmets (part number 171021).
Magnification lens has a 1.5X magnification factor
Magnifies the viewing area through your auto-darkening filter
Suitable for use with the Speedglas G5-01, 9100, 100 and 9002 series welding filters
Also available in 1.0X (part number 171020), 2.0X (part number 171022), 2.5X (part number 171023) and 3.0X magnification (part number 171024).