Brightline Replacement Brush Heads work with the Brightline Sonic Rechargeable Toothbrush with Adjustable Intensity (86700) to gently clean and whiten teeth by removing surface stains. Soft, contoured bristles are sculpted to correspond to the natural shape of your teeth, making it easier to reach every nook and cranny necessary while being gentle on gums. Includes 4 replacement brush heads (a 12 month supply).