Jandy Pro Series 1218C 18" x 6" Lip Clear Sheer Descent Waterfall produces a clear arc of water that can be adjusted from a silent, glass-like sheet of water to a rushing mountain waterfall. A captivating addition to any new, remodeled, or existing pool or spa. The 6'' extended lip waterfalls produce the same effect as the standard 1 Inch lip Sheer Descent Waterfall, but allow For installation of brick or stone on the face of the raised beam. Waterfalls with extended lips can be factory cut or are easily cut in the field to create custom radius curves.