Professional welding lenses for commercial or occasional use. This welding lens is the perfect replacement clear lens for most standard welding masks, suitable for most standard flip-up welding masks or reactor light masks. It is an anti-splatter lens made of plastic, making it more robust if dropped than glass lenses. This listing is for a pack of 10 lenses. The plastic lens can be cut down to smaller sizes if needed and is used to protect the darkening element. It is a replacement transparent protective lens cover for your auto-darkening welding helmet. The clear lens has a protective strip over either side to prevent damage or scratching before use. Specifications: Material: Plastic lens, Dimensions: 110mm x 90mm (4-1/4" x 3-1/2"), Thickness: 1mm, Pack Size: 10.