This series of nozzles come with the principle of a jet pump. When the water will produce a rich air suction, a jet with a small amount of water from the water column will be white opaque due to the reflective effect, by adjusting the height of the coat you can change the amount of air inhaled, more air inhaled, the watercolor is white, the presence of bubble is fine. The nozzle has a spherical joint, which can be rotated around the centerline axis to 15 degrees. It is suitable for all kinds of water spray pools inside and outside the room.