A daily must for a radiant smile! What are your smile goals? Double-length bristles for superior cleanliness AnjoCare has cut the bristles into different lengths to form a concave shape that enables thorough cleaning of the blind area of the mouth. Inspired round brush heads Inspired by professional dental tools, a round brush head provides tooth-by-tooth cleaning with specially designed bristles for optimal tooth coverage Great flexibility for better performance The bristles are flexible and can adapt their cleaning shape to your teeth, providing a great cleaning experience. Why choose SWSMSZ replacement brush heads? 1. 100% compatible with most Oral-B manual toothbrushes (except PulseSonic, iO.) 2. expertly designed replacement toothbrush heads and patented bristle technology for a phenomenal clean 3. sources for premium DuPont, recognized as the leader in quality in the oral care synthetic filament industry 4. dual-lengths bristle, medium stiffness, making it a daily choice, help to clean deeply.