The hearing aid domes fit with Oticon minifit hearing aids:Oticon Nera,Oticon , Pro,and those hearing aids receivers with new MiniFit speakers.Hearing aid domes should be replaced a month,because of cerumen "wax" buildup behind the wax . oticon hearing aid supplies comes with per order,which equals out to a of 30 domes each pack comes with 10 domes to use from.These domes for hearing aid accessories fit all ear types,that can be used on behind the ear hearing aids,pocket hearing aids,in-ear hearing aids and sound amplifiers,so you can go on with your life and your everyday activities.Notice:If a perforated eardrum, do not use the hearing aid domes.Material: plasticcolour: As shownPackage Contents:3 x hearing aid suppliesOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.