4-1/4" x 2" Auto Darkening Welding Lens Filter 3/11
Auto Darkening Welding Lens 3/11Light State DIN# 3    /    Dark State DIN# 11Unit size  4-1/4" x 2"Viewing area   3-5/6" x 1-1/3"Switching Time: <1/2000 Second at Room TemperatureSolar PoweredMinimum Lifetime of 5,000 Welding Hours