The Whitening Classic Tip is designed for general use with the Waterpik Whitening Water Flosser. The Whitening Water Flosser delivers precision whitening while you water floss. It is clinically proven to remove an additional 25% more stains than brushing alone and to remove up to 99.9% of plaque from treated areas. Replace tip every 6 months. 2 color-coded Whitening Water Flosser replacement tips per package (color of tips may vary).