These earbuds shape better and fits for most kinds of stethoscopes. If the old earbuds are continuously used, you will be unable to hear the sound clearly, difficult to give the right diagnosis. For , the old earbuds may hurt ear canal, even cause hearing loss, so this can be a good replacement for you to use more safely. Features - Color: black. - Material: PVC. - Size: 4.50X4.50X0.30cm/ 1.77X1.77X0.12inch. - It can better can fit most stethoscopes, sufficient for daily usage to help you diagnose better. - The ear tips are made from PVC material, safe for you to use with much more confidence. - Can keep your ears from the cold metal, especially in winter, offer good protection for your ears. - Reduce vibration, isolate interference from the external noise, very helpful when you are using the stethoscopes. - Flexible, softer, light weight, easy to use for your ears, professional and safe. Package list: 2 x Diaphragms 4 x Earplugs