Philips Sonicare toothbrush heads will allow you optimum cleaning performance, as long as you replace them at least every six months. The Sonicare toothbrush heads Advance (A-series) consist of two ultracompact replacement Sonicare brush heads. They fit all original Sonicare Advance series handles. Philips Sonicare toothbrush heads also come with bands to color-code the head of individual users, for more convenience. Each electric brush head features a longer neck and shorter rows with extra-soft, very rounded bristles. This toothbrush head fit well in small mouth, such as children’s, and allow precision reach around braces.