Good Compatibility & Easy Installation – These replacement brush head are specially designed and perfectly compatible with Colgate Hum smart electric toothbrush. Effective Cleaning – Extra soft bristles and floss-Tip bristles offer a gentle clean, ensuring thorough cleaning and gentle massaging your teeth and gums, remove more plaque. Standard Size – Our standard size toothbrush head can better meet the needs of adults, improve your brushing efficiency and cleanliness. Teeth Protection – These replacement heads are made with famous American soft bristles, the round-ended bristles provide gentle cleaning of tooth surface without hurt your teeth and gums. Convenient Packaging – 10 individually packages can meet your needs for two and half a years. The brushing experience is the same as the name brand. It is the best choice for economy and practicality. Toothbrush heads replacement compatible with Colgate hum battery electric toothbrush.