Feather:[Extra Soft Dupont Bristles] Specially made from gentle dupont bristles with end-rounded design, our toothbrush heads easily get rid of teeth stains and whiten your enamel with out hurting your enamel and gums.[Wide Compatibility] Our electric toothbrush replacement heads match with all Oral B and Braun Toothbrushes besides Oral-B Pulsonic and IO. They are compatible with Oral-B ProfessionalCare Series, Oral-B Triumph Series, Oral-B TriZone Series, Oral-B Advance Power Series, Oral B Vitality Precision Clean, Oral B Vitality Sensitive, Oral B Vitality White + Clean, Oral-B Vitality Dual Clean,except for Oral B Pulsonic and iO 3 dense 3-d bristles disguise hard-to-reach locations and supply a smoother cleansing experience. Work into healthful teeth and a white smile together with your new substitute heads.[Durable and reminder bristles] Due to DuPont bristles, the brush head is more durable. Each brush head has indicator bristles, and when the blue bristles turn white, you should update your toothbrush head. Dentists recommend changing your toothbrush each 3months: • Professional Care: 500, 550, 1000, 3000, 2000, 600, 1000, 3250, 5000,• 5500, 6000, 6500, 7400, 7500, 7550, 7850, 7875, 8000, 8300, 8500,• 8850, 8860, 8875, 8900, 8950, 3D Excel, Plak Control 3D• Triumph Professional Care: 9000, 9100, 9400, 9425, 9450, 9475, 9500, 9900, 9910, 9930, 9950• Trizone: 600, 1000, 3000, 5000• Triumph: 5000 wireless SmartGuide, 4000, Triumph 5000 inkl. Smart Guide• Smart Series: 4000, 4750, 5000, SmartSeries 4000, SmartSeries 5000 with SmartGuide,• Oral B Vitality Precision Clean• Oral B Sensitive Clean• Oral B White Clean• Advance Power: 400, 450, 450TX, 800, 850, 900, 950, 950TX• Plak Control: Duo, Travel, Duo• Interclean: IC2522, ID2021, ID2025, ID2025T• Pro Health: Precision Clean, Dual Clean• Vitality: Precision Clean, Dual Clean, Trizone, Sensitive, Floss Action, Pro white• Pro-Health Precision Clean