10 Pieces Replacement HeadsCompatible with Fairywill D7 / D8 Fw507 508 551 917 959 D1 D3 Black Toothbrush

- Comes in 10 pieces; provides ample replacements for long-term use, reducing frequent repurchases.? - Fits electric toothbrushes like D7/D8, Fw507, 508, 551, 917, 959, D1, D3, ensuring good compatibility.? - Features black design; adds a sleek look to match compatible toothbrush models.? - Designed as replacement heads; easy to install without extra tools for daily use.? - Suitable for replacing worn brush heads; meets regular oral care needs with multiple pieces.