For digital and glass thermometers. Fits most popular thermometers. Helps prevent cross-infection and recontamination. 50 disposable covers.Directions: 1. Insert thermometer into cover. 2. Peel paper backing down and snap off. 3. Insert covered thermometer (oral or rectal) for normal period of time. NOTE: If rectal use is advised by your doctor, lubricate tip of cover with a soluble jelly.