Description For use with models WP-60/65/70/75 Waterpik Classic Jet Replacement Tips (JT-70E) are designed for general use to clean between teeth and below the gumline. Clinically proven to be twice as effective as string floss for improving gum health. Replace every 6 months 2 color-coded water flosser replacement tips per package (color of tips may vary) Compatible with Waterpik Classic and Classic Professional countertop water flossers only: models WP-60, WP-65, and WP-72 How to use Waterpik Classic Replacement Tips (JT-70E): Start with the back teeth and follow the gumline, pausing briefly between the teeth and aiming the tip at the gumline at a 90-degree angle. Hold the tip slightly away from gums to allow the water flow to remove plaque and debris.