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 ce en "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 eard ,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.