Made by Oticon. These are for Oticon and Sonic Innovations hearing aid. Models: Ria, Ria2, Nera, Nera2, Alta, Alta2, Opn 1, Opn 2, Opn 3, Siya 1 and Siya 2, OpnS 1, OpnS 2, OpnS 3, Ruby 1, Ruby 2, More 1, More 2, More3, Zircon 1 Zircon 2, Real 1, Real 2, Real 3, Intent 1, Intent 2, Intent 3, Intent 4. There are 10 domes per pack, 20 domes.