Replacement Toothbrush Heads Compatible for X3U/X3pro/D2/D3S/D5 Sonic Electric Tooth(4 Clean Black)

- Replacement brush heads specially compatible with X3U, X3pro, D2, D3S and D5 sonic electric toothbrushes - Precise structural fit ensures secure attachment to the handle, preventing loosening during daily operation - Durable construction retains shape and functionality after repeated applications for long-lasting performance - Hassle-free installation allows quick and easy replacement whenever required - Lightweight and compact design enables easy storage and convenient carrying, ideal for home use and travel