Designed for the serious welder, this filter lens is a crucial component for welding helmets, providing essential protection and clarity during your work. With a shade of 10, it is expertly crafted from heat-treated, hardened glass that ensures optical correctness while safeguarding against harmful ultraviolet and infrared rays, adhering to GGG-H-211D and ANSI Z87.1 standards. The rectangular lens, measuring 5.25 inches by 4.5 inches, features smooth rounded edges for added safety and comfort, making it an ideal choice for a variety of welding applications. Whether you're engaged in light or heavy-duty welding, this lens is engineered to enhance your visibility and protect your eyes in demanding environments.