Experience unparalleled protection while welding with the Weldmark Filter Lens Shade 11, designed specifically for use with welding helmets. This rectangular lens, measuring 5.25 inches by 4.5 inches, is crafted from heat-treated, hardened glass that is both optically correct and precisely shaded to provide optimal visibility and safety. It offers essential infrared and ultraviolet protection, adhering to industry standards such as GGG-H-211D and ANSI Z87.1, ensuring that welders are shielded from harmful rays during their work. With smooth rounded edges and a thickness of 0.125 inches, this filter lens is not only functional but also enhances the durability and comfort of your welding helmet.