Auto-darkening welding helmet

NTM Auto-darkening Welding Helmets,the shell is made out of special nylon material. Welding filter size:90*110mm During the welding,the filter automatically changes from light state to dark state when an arc is struck. At the moment of stopping welding,the filter screen automatically changes from dark to light state slowly so as to protect eyes from being hurt by the rest arc. Using auto darkening welding helmets could protect user from hurt of infrared and ultraviolet rays,also increase working efficiency and product quality. Standards: EN168:2002, EN175-1997