Compatible For Fairywill Replacement Toothbrush Heads For FW-507/508/551/515/917/959/2011FW-D1/D3/D7/D8 Electric Toothbrush(BLACK 10 WHITE 10)

- Cost savings: Replacing just the brush head is more cost-effective than buying a new machine, making long-term use more economical. - Flexible operation: lightweight design, less wrist burden when manually touch-up brushing - Experience renewal: restore the clean feeling of when it was just bought, brushing is no longer perfunctory - Noise reduction: The new brush head has better balance, making the sound softer at high-speed vibration. - Family Sharing: Multiple brush heads in different colors to meet the needs of different members.