Standard earmold replacement tubes are pre-bent and tapered. Being pre-bent gives a close to the ear fit to make them less visible. The tapered end allows easy insertion into your earmolds. Changing your old stiff and discolored earmold tubes often improves the fit and appearance of your BTE hearing aids. Save money by changing your own tubes as often as you like! It's easy with pre-bent, tapered replacement earmold tubes from Advanced Hearing. Comes in a four (4) pack.