Stainless Steel Cascade Blade Nozzle, Water DESCENT, Water Blades, Water Fountain Modular design and convenient 4-inch Height make spillways ideal for garden wall Block construction Structural load bearing design allows for burial in masonry walls 304 stainless Steel spillways enhance any vertical wall in the poolscapes, landscapes, and wherever chlorine is used as a disinfecting agent Non-clogging weir reduces maintenance in open basin applications