Last for 6 months: replace every 6 months, good quality and last for a long time. Friendly tips: do not share jet tips with others. Compatibility information: the jet tips are compatible with most Waterpik Water Flossers, except for WP-14, WP-20, WP-30, WP-40, WP-60, WP-65, WP-70, WP-72, WP-75, WP-90, SR-400, WF-04, WF-05, WF-06, WP-560, WP-562, WP-563, WP-565, WP-567, WP-569, and other brands. Useful and practical tool: jet tips can offer a good pressure, these Periodontal tips can clean shadow zone between teeth and below the gumline, easy to put on, work nicely on the cleaning job. Set of 4 pieces: 4 pieces flosser Periodontal tips for general use, suitable for family using, enough quantity help allocate to each member of the family, good Periodontal replacement tips for the original one.

Item Dimensions LxWxH: 4.21 x 0.39 x 0.39 inches. Unit Count: 4.00 Count. Brand: Frienda.