Designed specifically for the Hornell 9000X/XF helmets, these clear inside cover lenses from Weldmark offer optimal protection while maintaining visibility. Crafted from 100% polycarbonate, each lens measures 4.25 inches by 2 inches and meets the ANSI Z87.1 standards for safety and durability. The pack contains five lenses, ensuring you have ample replacements on hand for your welding needs. With a thickness of just 0.030 inches, these lenses provide a reliable shield against sparks and debris without compromising clarity.