The hearing aid domes fit with Oticon minifit hearing aids:Oticon Nera,Oticon Alta,Alta Pro,and those hearing aids receivers with new MiniFit speakers. Hearing aid domes should be replaced once a month,because of cerumen "wax" buildup behind the wax guard. 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,please do not use the hearing aid domes. color:As shown Material:plastic size:8mm Package Contents: 2 x hearing aid domes Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.