This is the Super New GIZZMO. It is designed to absorb the expansion of winter freeze-up in swimming pool skimmers. The Super New GIZZMO is 16 inches long and installs in big deep skimmers of most in-ground swimming pools. The Super New GIZZMO has both 1 1/2 and 2 inch threads and features a generous bar style handle. The double threads offers convenience by accomodating most skimmers with one item. For a professional fit, the GIZZMO can be used with teflon tape. Teflon tape is a very thin white tape used to wrap the threaded ends of pipes to improve the watertightness of a joint. The GIZZMO is designed for single season use. Please remember to recycle this product.