This replacement tips fit most waterpik models, only few models are not compatible with. Compatible Models: Aquarius (WP-660, WP-662, WP-663, WP-665, WP-667, WP-668, WP-669) Aquarius Professional (WP-670, WP-672, WP-673, WP-674, WP-675, WP-676) Complete Care (WP-900) Complete Care 5.0 (WP-861, WP-862) Complete Care 5.5 (WP-811, WP-812) Complete Care 7.0 (WP-950, WP-952) Complete Care 9.0 (CC-01CD010-1, CC-01CD012-2) Complete Care 9.5 (CC-02CD010-1, CC-02CD012-2) Cordless Advanced (WP-560, WP-562, WP-563, WP-565, WP-567, WP-569) Cordless Select (WF-10W010, WF-10W012) Cordless Plus (WP-450, WP-462, WP-463, WP-465, WP-468) Cordless Freedom (WF-03CD010, WF-03CD012) Cordless (WP-360) Cordless Express (WF-02W010, WF-02W012) Cordless Professional (WP-440) For Kids (WP-260) Nano (WP-310) Nano Plus (WP-320) Ortho Care (WP-940) Radiance (WF-09CD010-1) Traveler (WP-300) Ultra (WP-100, WP-112, WP-113, WP-115, WP-117, WP-118, WP-140) Ultra Plus (WP-150) Not Compatible Models: Classic Water Flosser (WP-60/65/72) Whitening (WF-05, WF-06) Sidekick (WF-04)