Waterpik Sonic-Fusion (1) Flossing Brush Head *NEW*

(1) brand new, in package - just purchased in November 2023 for $24.99 (2 pack). I received a new electric toothbrush for Christmas, and this brush head is not compatible with my new model. Outside package says two, but there is one inside (I used the other one). X-posted. Ships same business day.