Cascade is a small to large injector nozzle generates a lively full water pattern and offers oxygen enrichment. With injector effect, water and air are suctioned in, mixed intensively and accelerated into the air by the injector jet as an impressive soft flowing fountain;Material: Brass; Inlet: 1/2" Female Thread & 3/4" Male Thread; 1" Female Thread;Working Pressure: 7.3-14.5 psi; Water Flow: 13.2-24.2 gpm; Jet Spray Height: 6.5-16 feet. Thread size comparison:1/2"≈20mm, 3/4"≈25mm, 1"≈33mm, 1.5"≈48mm, 2"≈60mm