Black Toothbrush Heads Compatible for 400pcs(50packs) Bristle

- 400-Piece (50-Pack) Black Set: 400 black replacement brush heads (50 packs), ideal for bulk/long-term use, no frequent repurchases.? - Bristle Design: Features practical bristles, suitable for daily tooth cleaning needs.? - Protective Bristle Care: Maintains bristle integrity for consistent use over time.? - Fit & Stability: Designed for secure interface fit with compatible toothbrushes, no looseness.? - Gentle Cleaning: Soft bristle texture, gentle on teeth and gums, reduces discomfort.?