Feature: 1. Lens Protector: These spare lenses are used to replace broken or worn lenses and ensure the lens by placing them in front of the auto darkening lens. 2. Crush Resistance: These lenses are very resistant to compression and drops, they are sturdy and not easily damaged, making them ideal for industrial welding jobs. 3. PC Material: Made of polycarbonate, these lenses feature high strength and modulus of elasticity, high impact strength, good fatigue resistance, good dimensional stability, and high transparency. 4. Outer and Inner Lens Sets: There are 3PCS circular outer screen and 2PCS inner screen in the set, which can meet your needs, and you can use them by yourself. 5. Sturdy and : Polycarbonate also has good safety and durability, and lenses made of it have a long service life. Specification: Item Type: Large Viewing Screen Replacement Lens Material: PC Specification: Length of Circular Outer Screen: Approx. 34cm / 13.4in Inner screen: Approx. 105.3 x 65.8mm / 4.1 x 2.6in Thickness: Approx. 1mm / 0.04in Package List: 5 x Large Viewing Screen Replacement Lens