The 3M Speedglas 9100X ADF Welding Lens Shade FILTER 9100 is a premium auto-darkening filter designed specifically for use with auto-darkening welding helmets. Manufactured in Sweden by the reputable brand Speedglas, this filter ensures optimal protection and visibility during welding processes. With its advanced technology and high-quality construction, this filter is a reliable choice for welders seeking superior protection and performance in their welding applications.