Protect your welding helmet's auto-darkening filter with these premium clear cover lenses. Each pack includes 10 high-quality polycarbonate lenses measuring 4.5 x 5.25 x 0.04 inches, designed for universal compatibility with major welding helmet brands including Lincoln Electric Viking series models 3350, 2450, 750S, and 850S. These durable lenses provide essential protection against scratches and weld spatter while blocking 60% of radiation heat to prevent lens distortion and extend the life of your auto-darkening filter. Perfect for both professional welders and DIY enthusiasts, this bulk pack offers excellent value without compromising on quality. The precise dimensions ensure perfect coverage for standard welding helmet windows, making these replacement lenses a reliable choice for maintaining clear visibility and protecting your investment in welding equipment.