Crafted from Superior Optical Grade Acrylic: Constructed from high-quality optical grade acrylic, these lenses offer exceptional clarity and durability, resisting scratches and impacts to maintain visibility and protection. Optimal Size for Enhanced Visibility: Each lens in this 3-piece set measures 3.54 inch x 4.25 inch, designed to fit seamlessly into a wide range of large welding helmets, ensuring broad compatibility and easy installation for professional and amateur welders alike. Enhanced Magnification for Precision Work: Featuring a 2.5 magnification, these lenses enhance your vision during intricate welding tasks, allowing for greater accuracy and reducing eye strain during long hours of work. Universal Compatibility with Major Helmet : Designed to be versatile, these lenses are compatible with most large welding helmets available on the market, making them a perfect upgrade or replacement for your existing welding gear., Weight: 0.52029093832 pounds, Manufacturer: Duanthry