Unlike traditional 4 x 4 gauze sponges, Denta-Sleeves provide complete contact of your disinfectant with dental device surfaces to assure no bare spots. Denta-Sleeves also keep sterilized instruments covered until use. Cover suction controls, saliva ejectors, slow- and high-speed handpieces, intraoral scopes and other sensitive instruments. Non-sterile. Denta-Sleeves do not contain cellulose.