Features an economical lens for the consumer welder. Solar powered. Fixed shade 11 lens with one centered sensor. Solera lens is also compatible with 490P and 411P shell. W30 series fixed shade auto-darkening filters: auto-darkening filters (ADF) eliminate the need to raise the welding helmet. As technology evolved, the reliability, safety and cost of ADFs have reqped these same benefits. Ideal for all welders - from novice to experts. Meets the ANSI Z87.1 standard. Measures 4" Length by 2" width.