The unique Precision Clean bristles brush away plaque for a superior tooth-by-tooth clean than with a regular manual toothbrush. Oral-Bs improved Precision Clean toothbrush heads are developed with CleanMaximiser technology that turns green bristles yellow for optimal brush head performance and the best clean. Compatible with all Oral-B handles except Pulsonic & iO.With CleanMaximiser technology, green bristles turn yellow when it is time to replace your brush headUp to 100% more plaque removal and healthier gums vs. a regular manual toothbrushThe unique bristles brush away plaque for a superior tooth-by-tooth clean than with a regular manual toothbrushCompatible with all Oral-B handles except Pulsonic & iOFrom the #1 brand recommended by dentists worldwideNumber of toothbrush heads included in this pack: 8