[Material]:This Welding Lens is made of plastic,ensuring durability and longevity [Advanced Technology]:The Automation Filter Shade Eyes Goggles features an automatic darkening filter with a lampshade,providing full against sun and infrared during the entire welding process [Solar Powered]:The Auto Welding Lens is powered by solar,making it more environmentally friendly [Automatic Power On/Off]:The power supply of the Welding Helmet Replacement Lens automatically turns on and off,providing convenience and efficiency in usage [ for Dimensions]:The size of the Solar Welding Mask is 4.25inch x 1.97inch,compact enough for easy handling yet large enough to provide ample, Weight: 0.0771617917 pounds, Manufacturer: Zanthicia