The Spectacle Kit 6878 is for the 3M 6000 Series of full face respirators, including the 6800DIN. It permits the wearer to use his or her corrective lenses while wearing the mask, and adjust their position for comfort. The frame comes empty, and must be filled by your local optometrist. It attaches inside the facepiece lens. For use with the 3M Full Face Respirator or the 6800DIN Full Face Mask.