The WaterGuru SENSE fits any round pool skimmer opening of approx. 8” to 9".
If you have a square skimmer, we offer an adapter for square skimmers up to 10" in size.
Here is the link to purchase the WaterGuru Square Skimmer Adapter.
Note: The square skimmer is 10" by 10" in size and works if the interior of your skimmer is square or round.