Oral-B Precision Clean replacement brush heads with CleanMaximizer bristles for optimal cleaning, 8 pieces. The innovative CleanMaximizer technology changes the color of the green bristles to yellow, signaling the best time to replace the brush head for effective cleaning. The Precision Clean brush head surrounds each tooth individually and reaches difficult areas, removing up to 100% more plaque than a conventional manual toothbrush. Compatible with all Oral-B handles, except Pulsonic and iO. Product features: - CleanMaximizer technology changes green bristles to yellow, indicating when to replace for cleaning - Removes up to 100% more plaque than a conventional manual toothbrush - Surrounds each tooth individually and reaches difficult areas - Compatible with all Oral-B handles, except Pulsonic and iO - Package includes: 8 Oral-B Precision Clean replacement brush heads.