DescriptionTHIS PATENTED, INNOVATIVE DESIGN makes adjusting the height of your Ebb & Flow fittings easier than ever while bringing convenience to your garden. Simply position the neck of the fill/drain screens to the desired height and then twist to lock into place. This allows you to easily adjust the fill height of the water in the flood table.See “Features & Benefits” video and the “How to Use” video on “videos tab” to watch how the Ebb and Flow Kit operates!@@@@@@Product Features• Includes (2) 2-1/2” and (1) 8” Long Adjustable Fill/Drain Screens• 1/2” Barbed Fill Fitting• 3/4” Barbed Drain Fitting@@@@@@VideoFeatures & Benefits: Danner Supreme Hydro Ebb & Flow Kit. Stacking System vs Adjustable SystemHow to: Use the Danner Supreme Hydro Ebb & Flow Kit for Gardening@@@@@@Manuals