Stainless Steel, Waterfall Spillway Rectangular Wall Mounted Swimming Pool Fountaine Waterfalls The STEELARTCRAFT 45cm/18 INCHES Length Outdoor Waterfall Pool is a wall-mounted stainless steel spillway designed to create a decorative, constant sheet of water for pools, ponds, or garden walls. Its polished, durable, and rust-resistant construction can withstand chlorine and saltwater environments.