The thermometer probe covers are made of durable PE film and papermaterials to guarantee safety when using the thermometer as Oral, Underarm or Rectal. You can now reduce the risk of spreading insanitary and harmful things by using thermometer sleeves. Features -Color:Assorted Color -Material:PE film, paper -Size:10.00X2.50X0.10cm/3.93X0.98X0.04in -Made of PE film and paper material, safe and practical, you can use them confidently. -Using these covers does not compromise your digital thermometer's accuracy. -Insert the thermometer into the cover along the direction of the arrow on the package then peel off the cover. They are easy to use. -You can rest assured that they are safe and help prevent the spread of germs. -The workmanship of this product is perfect, and you will have a good experience in using it.Packing list50 x Thermometer Covers