Replacement Heads Toothbrush Sets FW-507 FW-508 FW-917

- Fits toothbrushes: FW-507, FW-508, FW-917; ensures proper compatibility with specified models.? - Designed as replacement head sets; provides multiple replacements for regular use.? - Suitable for replacing old or toothbrush heads; meets daily oral care needs.? - Serves as practical toothbrush accessories; easy to integrate into daily use.? - Simple to install; no extra tools needed, convenient for quick replacement.