Hearing Direct sources hearing aid accessories directly from a number of the world's leading manufacturers. Rest assured that you are purchasing original branded accessories when you shop with us. Domes are an important component of hearing aids - they provide the correct seating for the hearing aid in the ear canal and ensure a comfortable fit. So it’s important to get the right size and style for your Signia hearing aid. Signia supplies a large range of domes to fit their various thin tubings and receiver wires. If you are unsure of which Signia dome is right for your hearing aid or dont see your dome here, please contact our expert team.