What is the size of the circle and the length of the ceramic rod?
And what is the diameter of the circle and the length of the impeller (magnet)?

I put it in and it produced a better foam. Happy and the price was great.

Bought this because the original mesh-wheel kept jamming. Replaced it with this and it's been fine ever since (touch wood).
Can't say whether it's better or worse at producing bubbles than the mesh-wheel was, but at least I'm confident that it won't jam!