Replacement Electric Toothbrush Heads 10/20PCS Compatible for S9(10Pcs)

- Replacement electric toothbrush heads compatible with S9, available in 10 and 20-piece packs - Dual pack size options meet both short-term and long-term replacement demands - Precise fit design ensures stable attachment to the toothbrush handle during use - Tool-free installation allows quick and hassle-free replacement whenever required - Compact and lightweight structure enables easy storage and convenient carrying for home and travel