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For general use. Cleans deep between teeth and below the gumline. Clinically proven to be twice as effective as string floss for improving gum health. For use with Waterpik® Cordless Plus Water Flosser WP-450 and as the High Pressure Tip for the Waterpik® Cordless Water Flosser WP-360. As well as the Ultra (WP-100 and WP-100W). Change every 6 months.