Feature: 1. Soft and skin-friendly brush hair, it does not hurt your gums, care for teeth. 2. Can deeply clean teeth, remove plaque and tooth stains, keep teeth in healthy condition. 3. Compatible with various types of sonic electric toothbrush, practical for use. 4. Easy to be installed on electric toothbrush main machine, bring you convenience. 5. Bright color, 4pcs toothbrush replacement heads are available, enough to satisfy your needs. Specification: Condition: 100% Brand New Item Type: Toothbrush Head Model: BL551-X Scope of Application: Fit for Sonic electric toothbrush Package List: 4 x Toothbrush Head