Stationary toothbrush tip allows water to pulsate through the brush to clean and rinse the tooth sur;Recommended for use with...;Replace every 3 months;WP-100, WP-112, WP-260, WP-300, WP-440, WP-450, WP-462, WP-480, WP-660, WP-672, WP-674, WP-900;2 Water Flosser replacement tips per package