A hearing aid  Ear Tip dome is the small plastic bell-shaped piece at the end of the tube.

This is the actual physical piece that is inserted into the ear.A proper fitting dome can make a huge difference in both comfort and quality while patient wearing their hearing aid.

Domes are pre-sized, disposable earpieces that are placed on the hearing aid's receiver or thin tube to fit comfortably in the ear. Domes range from open domes to closed power domes. Domes are made of a soft rubber material.