ITEM NAME:4-1/4 X 2-inch Solar Auto Darkening Welding Lens Helmet Filter Shade 3-11, It Description: Widely Used - It fits all standard welding helmet window opening. Shade Automatically - It can shade automatically in welding states and filter out the bad light. Good Experience - You will have a good experience with it at working and prevent occupational disease. High Clear View - High clear view filter Use high standard of LCD and multilayer optical interference filter. Perfect Gift - The Solar Auto Darkening Welding Lens Filter with solar charge function and full automatic ON/OFF. Specification: Material: PP Polyproplene Color: As picture shown Length: Approx. 108 mm / 4.25 inch Width: Approx. 51 mm / 2.01 inch Light states: DIN3.5 Dark states: DIN11 View area: Approx. 91.5 x 34 mm / 3.6 x 1.34 inch Power: Solar/ Lithium Battery, no battery change required Lithium Battery Capacity: 60mAH Reaction Time: 4/10,000 Second Dark To Light Delay: 0.2 Seconds Operating Temperature: -10℃ï ½Å¾65℃ Sensors to Weld Arc: 2Pcs Package Includes: 1 Piece Auto Darkening Welding Lens Filter Note: Since the size above is measured by hand, the size of the actual item you received could be slightly different from the size above. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same. SKU: DMO0012520673009635.1 Piece Auto Darkening Welding Lens Filter. Shade Automatically - It can shade automatically in welding states and filter out the bad light. Power: Solar/ Lithium Battery, no battery change required.