Healthy Material:It is made of plastic material,high-quality,convenient durable and safe. Universal Size: thermometer probe covers fit most digital thermometers,each cover measures 3.75 x 1.02 inches/ 9.52 x 2.6 cm Still :It does not compromise your digital thermometer's accuracy by using these covers. Easy To Use:Insert the thermometer into the cover along the direction of the on the package then off the cover. The thermometer covers:It contains 100 individual sealed probe covers of putting the thermometer probe in the mouth area to that you are using a sanitary and clean thermometer single time. Features Color: white Material: plastic Size: About 8.8x2.5cm. Package Contents: 100 * Thermometer Covers Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.