Compatible for SOOCAS Sonic Electric Toothbrush Heads Replacement X1 X3 X3U X5 Teeth Brush(Black 2 pcs)

- Fits X1/X3/X3U/X5 sonic electric toothbrushes; ensures proper compatibility with specified models.? - Designed as replacement toothbrush heads; suitable for swapping out old or worn parts.? - Works with sonic electric toothbrushes; supports daily oral care routines effectively.? - Serves as practical toothbrush accessories; meets regular replacement needs simply.? - Easy to install; no extra tools needed, convenient for quick replacement in use.