Amazon.com : Oral-B iO Series 7 Electric Toothbrush with 1 Replacement Brush Head, Black Onyx, 3 Count (Pack of 1) : Health & Household
Amazon.com: Oral-B iO Ultimate Clean Electric Toothbrush Head, Twisted & Angled Bristles for Deeper Plaque Removal, Pack of 4, Black : Health & Household
Oral-B iO Series Electric Toothbrush Replacement Brush Heads, Ultimate Clean (6 ct. Refills) - Sam's Club