Experience optimal protection while welding with the Weldmark Filter Lens Shade 12, designed specifically for use with welding helmets and goggles. This rectangular lens, measuring 4.25 inches by 2 inches, is crafted from heat-treated, hardened glass that is both optically correct and precisely shaded to ensure clarity and safety. With its smooth rounded edges, this filter lens offers ultimate defense against harmful ultraviolet and infrared rays, making it suitable for various welding applications, from light to heavy duty. Complying with industry standards, it guarantees IR/UV protection as specified in GGG-H-211D and ANSI Z87.1, ensuring that your eyes remain safeguarded in demanding environments.