... welding mask,Auto-Darkening welding Mask,solar welding mask,Model:AM-1(RED) Design features: 1, shading, knob conditioning installed in the shell masks, convenient adjustment 2 ... batteries 5, UV transmittance: 313 nm - 365nm <0.0002%6, welding masks size / weight: 335x220x220mm/520 regulation: φ165-φ200 mm 7 ...