Marketing World Pool MKW-6554 Super New Gizzmo Super new gizzmo threads into skimmer and allows expansion during the freezing period in winter It is 16-inch long and installs in big deep skimmers of most in-ground swimming pools This gizzmo has both 1-1/2 and 2-inch threads and features a generous bar style handle Double threads offers convenience by accommodating most skimmers with one item Designed for single season use