Our premium standard brush heads are manufactured in a facility approved by FDA, with the highest health and safety standard. They have the most comparable quality of Oral-B precision clean toothbrush heads. These replacement toothbrush heads are compatible with most oral b electric toothbrush handles. They have in-built bristles which bend easily to ensure flexibility, thorough cleaning capability and also enabling both gentle brushing and deeper cleansing between teeth. They are compatible with the following oral B electric toothbrush handles: oral b vitality precision clean (all models); oral b vitality dual clean (all models); oral b professional care (all models); oral b professional care smart series (all models); oral b trizone (all models); oral b advance power (all models); oral b pro health (all models); Oral B triumph (all models); Oral B 3d excel (all models). Our heads are not compatible with Oral B vitality sonic, oral b cross action power, oral b sonic complete Oral B pulmonic.