The Sentinel A50 Inside Cover Lens from ESAB is designed to enhance your welding experience with its superior optical performance. Made from durable polycarbonate, this lens boasts a 1/1/1/2 optical class rating, ensuring exceptional clarity and definition of the weld pool through its ultra-clear true-color technology. Measuring 3 9/10" x 2 1/2", this replacement lens is a crucial component for maintaining optimal visibility and safety while welding, making it an essential addition to your protective gear.