These earbuds hold their shape fit most brands. If the old earbuds 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 and wearing worn out earbuds may hurt the ear canal and even cause hearing loss. Features - ColorAssorted Color - Material: Rubber. - Size: 41.00X0.50X0.50cm/16.11X0.20X0.20 inch. - We provide you with 1 set of replacement , hose and diaphragm for stethoscopes, sufficient for daily usage. - The are made of premium rubber material, which are safe for people to use. - These earplugs are just suitable for stethoscopes with metal parts. - Can keep your ears from the cold metal, especially in winter. - Can reduce the vibration, isolate the interference from external noise, practical and helpful when using stethoscopes. Package list: 1 x diaphragm 2 x earplugs 1 x hose