... digital 4 arc sensors solar auto darkening welding filterTop Features:Expert digital 4 arc sensors solar auto darkening welding filter,Website:http://www.chinaweldinghelmet.com, ... optical 1/1/1/2 clarity available in a welding filter. It is ideal for a range of industries ... , shipbuilding, structural, offshore and pipeline that use multiple welding processes, including Stick, MIG and TIG.1. Digital ...