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. Replacement Toothbrush Heads Compatible with Colgate Hum Connected Smart Battery Electric Toothbrush Head