Top quality generic toothbrush head replacement Soft bristles in center to protect tooth from harsh brushing Color coded rings for individual identification Indicator bristles color fades to signal time for replacement Compatible With Braun Oral B Professional Ortho OD17-4(OD-17A) 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,Vitality Precision Clean, Sensitive Clean, White Clean Advance Power: 400, 450, 450TX, 800, 850, 900, 950, 950TX Plak Control: Duo, Travel 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 NOTE: NOT compatible with Oral B Vitality Sonic | Oral B Cross Action Power | Oral B Sonic Complete | Oral B Pulsonic.