SUPERIOR QUALITY - Jiuzhoudeal Replacement Toothbrush Heads are High Quality Approved, Replacement Brush Heads Made with High Quality Bristles. Provide The Highest Health And Standard. | HIGH COMPATIBILITY - These Replacements Brush Heads Compatible with Phillips Screw-on Electric Toothbrush Handles. | BLUE INDICATOR BRISTLES - Blue Bristles Will Fade In Color to Tet You Know When It's Time to Replace Your Brush Head. Recommend Replace The Toothbrush Head At Least Once Every 3 Months. | EFFECTIVE CLEAN - Jiuzhoudeal replacement brush heads are made with end-rounded Bristles for offering better clean of hard-to-reach areas and bringing comfortable brushing experience. | WHAT'S IN THE BOX - Contains 6 Pack of Replacement Toothbrush Heads With 6 Crystal Caps for Storage And Travel.