3M Clip-on Welding Shield Kit is ideal for use in conjunction with the 3M full facepiece 7800S series respirators and 3M electronic lens assembly 7991/7991-AM. Welding shield kit featured with large viewing area enhances wearer safety. It offers guaranteed performance with standard 4 1/2" by 5 1/4" lens that is best suited for demolition, facility maintenance and sanding operation.