These silicone ear tips hold its shape well and fits most stethoscope brand. If the old buds are damaged heavily, the sound conduction may be hindered and you will be unable to hear the sound clearly. It is hard to give the right diagnosis without knowing the real state and wearing worn out earbuds may hurt ear canal and even cause hearing loss. Feature - Color: Black- Material: Silicone- Size: About1.40X0.90X0.90cm/0.55X0.35X0.35inch- The replaceable ear buds are in good quality and comfortable, better sound conduction.- We provide you with enough pairs of replacement ear tips for stethoscopes, sufficient for daily usage.- The ear tips are made of premium silicone material, which are safe for people to use.- The using method is easy can you can replace them in several seconds.- Can reduce the vibration, isolate the interference from external noise, practical and helpful when using stethoscopes.Packing list: 10 x pairs of stethoscope replaceable earbuds