Features:High-impact resistant ABS material. Automatic darkening welding filter lens with shade. Overall-process protection against UV and IR. Power supply solar cells ,no battery change required. Power Turns on and off automatically.Return delay Time: 0.2S Specifications:Shade Number in Light State: Din4# Shade Number in Dark State: Din9# Size: 108mm/4.25"×50mm/1.97" View window: 90mm/3.54"×32mm/1.26" Quantity: 1pc Note:Transition: 1cm=10mm=0.39inch Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package includes:1 × Welding Lens