16 Pack Replacement Toothbrush Heads Compatible Sonicare HX614-X White Lot of 4 Lot of 4 packages of replacement toothbrush heads designed for compatibility with leading electric toothbrushes, including Philips Sonicare models. These unbranded HX614-X standard clean heads feature high-quality DuPont bristles with blue indicator technology to signal when it is time for a replacement. Each pack contains 4 heads for a total of 16 units, providing a comprehensive dental care supply. Constructed from food-grade materials, these medium-stiffness bristles are designed to be tough on plaque while remaining gentle on gums for a powerful clean between teeth.