Replacement Toothbrush HeadsCompatible for Sonicare Electric Brush Head 1100 2100 4100 5100 5300 6100 7500(8A1)

- Fits sonic electric toothbrush models 1100, 2100, 4100, 5100, 5300, 6100 and 7500, ensuring stable connection during daily use.? - Designed to match the sonic function of compatible electric toothbrushes, supporting coordinated cleaning operation.? - Serves as dedicated replacement heads, aligning with the structural design of the compatible toothbrush models.? - Easy to install and replace without additional tools, convenient for maintaining regular oral hygiene routines.? - Suitable for daily teeth cleaning needs, adapting to consistent oral care habits for long-term use.?