The Oral-B Floss Action Replacement toothbrush head provides a floss-like clean*. The round brush head is inspired by dental professional tools for a tooth-by-tooth clean, with specially engineered bristles for optimal tooth coverage. The Floss Action toothbrush head has unique floss action bristles to loosen plaque. *on a Oral-B Pro 2000 or higher, does not replace flossing. Compatible with Oral-B Genius 8000, Oral-B PRO 7000, 6000, 5000, 3000 and 1000, and Oral-B Vitality. Each order comes with 3x Oral-B Floss Action Electric Replacement Toothbrush Heads.