The Oral B charcoal replacement toothbrush head features end-rounded, charcoal-infused bristles. Cup-shaped bristles remove stains, such as tea and coffee, for whiter teeth. The round brush head is inspired by dental professional tools for a tooth-by-tooth clean, with specially engineered bristles for optimal tooth coverage. Each order comes with 9 Oral B charcoal electric replacement toothbrush heads. Fits most Oral B rechargeable handles (does not fit Oral B without).