Roll down rubber eyeguards help protect eyes and eyeglasses from making contact with eyepieces. They also reduce infiltration of ambient light into the field of view. Fits all Accu-Scope 3000-LED and 3000 series eyepieces (model numbers 00-3113-20, 00-3113-20R, 00-3113-20F, 00-3114-20, 00-3113-18)