To enhance treatment of gum disease and periodontal pockets, the Classic Professional includes a special reservoir and the Pik PocketTM Tip for gentle delivery of antimicrobials and special rinses below the gumline. Removes up to 99.9% of plaque from treated areas and is up to 50% more effective for improving gum health vs. string floss. This model comes with 3 tips, 6 pressure settings on-handle, and a 2-year warranty. Waterpik® is the #1 recommended water flosser brand, clinically proven and accepted by the American Dental Association (ADA).