Replacement Waterpik Water Flosser Tips Classic Jet Nozzles for Oral Irrigator WP 100 300 450 660 [Advanced Design]: These replacement tips are ideal for everyday use to clean teeth and improve oral health. Various accessories meet diverse needs. [High Compatibility]: These replacement tips are compatible with most WaterPik water flossers, including Kids Water Flosser, Cordless Professional, Ultra Water Flosser, Aquarius Professional, Cordless Plus, and all Designer Series Water Flossers. [Deep Cleaning]: Replacement flosser tips provide universal use for cleaning deep between teeth and below the gum line. They are twice as effective as string floss for improving gum health. [Replacement Tips Changing]: It is recommended that standard nozzles and tongue cleaning nozzles be replaced every six months, and other nozzles be replaced every three months. Material: Plastic Color: As shown Package Contents: 1 set x Replacement Tips Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement allowance is +/- 1-3 cm.