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<div><p>UV transmittance: <0.0001% (210-365nm) Size of cartridge: about 108x50x5.2mm Dark state: 4/11 View area:89x30mm Infrared transmittance: <0.01% (780- 2000nm) Package Included: 1 x welding lens Response time: 0.5ms Recovery time: 0.3- 0.7 S (automatic adjustment) This is high quality Solar Auto Darkening Welding Lens Filter,with solar charge function and full automatic ON/OFF,very convenient and efficient. It can shade automatically in welding states and filter out the bad light. You will have a good protection with it at working and precent occupational disease. If you want to get a effective and safety environment,buy it now!!! It Fits all standard welding helmet window opening. Automatic ON/OFF Easy and safety to operate Light weight design High clear view filter Use high quality LCD and multilayer optical interference filter.</p></div>