These are Generic domes for Oticon hearing aid models: Ria, Ria2, Nera, Nera2, Alta, Alta2, Opn1, Opn2, Opn3, Siya1 and Siya2, OpnS 1, OpnS 2, OpnS 3, Ruby1, Ruby 2, More1 More2 and More3, Zircon 1 and Zircon 2. There are 10 domes in the pack.