High-quality materials: Built-in high-quality PC lens with hardened, heat-resistant, filterable, anti-wear and anti-corrosion. PC material is generally used for military and industrial protection. The material has excellent impact resistance and the polycarbonate lens is not easy to break even with a hammerMulti-function: These auto-darkening solar welding goggles also feature anti-radiation ultraviolet, infrared, anti-glare, protect eyes from sparks and harmful rays; also a flexible, lightweight design that you'll be happy to wearAuto-darkening design: the auto-darkening filter automatically switches from a light state to a dark state when an arc is struck, and back in the luminous state when the welding stopsEasy to use: the frames of the glasses can be adjusted; the mirror legs can adjust the length for long term comfort. On the welding helmet, the welder has a clear view and both hands are free to locate the placeWide applications: solar cells, no battery change required; easy and safe to use, lightweight design; suitable for gas welding, steel, cutting, welding and so onSize: about 15 x 6.5cmColor: as the pictureQuantity: 1 piece