Bubbling fountain nozzle has the spray out water just like the bubble.That is fixed underwater.it made negative pressure through high speed water flowing,inhales air from pipe that is in the air to produce mix shape water pattern.The pattern is strong,white ,well effect with lighting. ModelConnectionsPressure(kpa)Discharge(M³/h)Height(m)Diameter(m)YSN4007 G¾ 50-100 2-5 0.2-0.4 0.1-0.3 YSN4008 G1 50-100 3.5-8 0.3-0.5 0.2-0.4 YSN4009 G1½ 50-100 10-18 0.4-0.8 0.3-0.5 YSN4010 G2 60-150 17-25 0.4-0.8 0.3-0.6