Oral-B Ultimate Clean iO rechargeable Tooth brush Refill brush HeadsCOMPATIBLE ONLY WITH ORAL B iO ELECTRIC TOOTHBRUSH HANDLES You Will Receive 2 Oral B iO Ultimate Clean replacement brush heads Combines Oral B unique round brush head with gentle micro vibrations for a surprisingly enjoyable experience and healthy teeth and gums for life Reduces plaque build up along the gumline The dual length bristles surround and reach deep in between teeth and have higher density for an ultimate clean