1、Fitment: Sound amplifier dome set is suitable for Oticon Nera, for Oticon Alta, for Alta Pro, and for MiniFit speakers, bring you perfect fitment. 2、Washable: Sound amplifier open domes should be replaced weekly because the earwax builds up behind the cover, can be washed for second use. 3、Opening: Sound amplifier domes can help improve hearing and reduce noise interference, open design can also prevent the uncomfortable feeling. 4、Replaceable: Sound amplifier open domes can prevent static, wear for a long time without static damage, can be removed and replaced at anytime. 5、Premium Silicone: Sound aid ear tips are made of premium silicone material, soft and skin friendly, which is comfortable for you to wear for all day. Item Type: Sound Amplifier Open Domes Material: Silicone Function: Sound aid accessories, mainly used for bass double minfit ear plug sound aids. 10 x Sound Amplifier Open Domes