?PROFESSIONAL MANUFACTURER? - 10 years production experience, import to USA VIP enterprises, now retail to consumers directly. Best quality assuring, best service assuring, 30 days money back GUARANTEE!. ?SIZE? - Double layer power ear dome diameter: 7mm+9mm+12mm,Extra carry case external size : 2.76 * 2.76* 0.78 inch(7*7*2cm) ,small carry case is perfect for travel, hiking, gym vonpriand other outdoor activities. ?STAY PUT? - Innovative Internal spiral design keep domes comfortably sit in the ear WITHOUT FALLING OUT . The soft rubber wouldn't leak of the sound and more stable during the movement,like walking and meeting. ?COMFORTABLE FIT? - Our power ear domes including 4 sets 7mm+9mm+12mm (12 Pieces)and 1pc carry case. It is convenient and easy for you to fit the best. ?SUIT FOR? - The hearing aid ear domes could be used for OPEN FIT , Receiver In The Canal hearing aids, such as Oticon, Siemens, Resound, Phonak, Starkey, Otofonix, Advanced Hearing, Hearing Assist or MD hearing aids, etc.

Item Dimensions LxWxH: 2.76 x 2.76 x 0.78 inches. Power Source: Battery Powered. Brand: Jofi linkim. Best Sellers Rank: See Top 100 in Health & Household. : B08QTPZN8Z. Date First Available: January 7, 2021. Product Dimensions: 2.76 x 2.76 x 0.78 inches; 0.63 Ounces.