The regular size Gizmo is 9 inches in length with 1-1/2 inch threads and is designed to absorb the expansion of winter freeze-up in short aboveground swimming pool skimmers. It installs in short skimmers found in both aboveground and inground swimming pools. The Regular Gizzmo features a generous bar style grip for easy handling.

The Gizzmo absorbs the expansion. The water will crush the Gizzmo instead of destroying the skimmers. It's that simple. No assembly is required.