Includes 3 Brush Heads (appr. 3,81cm), 1 Foam Pad. Die Brush Head Replacement Instructions: To replace the brush head, grasp the brush head and slide one end of the brush head out of the hole in the plastic arms (the plastic arms that hold the head in place are flexible enough to release the head). Insert the new brush head, one end at time, make sure the ends of the new brush line up in the holes of the arms. Brush holder sold separately 660513