Brand new never been used auto darkening filter 9100 XX. This filter is to be used in conjunction with welding helmets specifically 3M speedglas. Please see pictures for details and feel free to ask any questions. The item "New 3M Speedglas Auto darkening filter 9100XX" is in sale since Sunday, December 9, 2018.This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Welding & Soldering Equipment\Welding\Welding Protective Gear\Welding Helmets". The seller is "koolguybri1_0" and is located in Buena Park, California. This item can be shipped to United States.