Feature 1. First clean the center of tongue using the outer ridge. 2. Extend the tongue as far as possible and with the tongue cleanser reach to the furthest point of the tongue. 3. Sweep the tongue cleanser along the center of the tongue towards the lip of the tongue. 4. Rinse the tongue cleanser after each stroke with clean water and repeat several times for maximum effect. 5. Clean the sides of tongue using the smooth flat side of the cleaner. Rinse and repeat for maximum effect. Specification 1,100% new and high quality 2materialPlastic 3colorpink \blue 4size17.8 cm Package include2pcs / 1set Note There is 2-3% difference according to manual measurement. Please check the measurement chart carefully before you buy the item. Please note that slight color difference should be acceptable due to the light and screen.