The bristles are contoured in such a manner that they can easily reach every nook and corner of your teeth. The floss is efficient in removing plaque and debris, leaving your teeth thoroughly clean.Compatible with : WP-100, WP-100W, WP-660, WP-662, WP-112, WP-462, WP-670, WP-672, WP-676, WP-250, WP-260, WP-300, WP-900, WP-940, WP-950, WP-952,DS-600W, VA-EB006, FC168, FC188, FC158, V300, V400, V600, V660.With the bristles, the head is sure to stand the test of time and retain its shape and functionality long after purchase. This means that you won't have to worry about constantly replacing the heads and can use them for an extended period.When compared to other electric toothbrush replacement heads, this replacement heads are highly cost-effective. Replace tips every 3 months for hygienic recommendation and efficiency.