Diamond Vulcan Nozzle A simple fountain nozzle comprised of a set of 4 mm water jets arranged in such a way that on rising they look like the trunk of a palm tree and on falling like its leaves. Spectacular Crossed Jets performed by the Palm Tree Nozzle The angle given to the jets means that, from wherever they are positioned, spectators can see the front and back jets cross over producing an aesthetic effect of great beauty in the architectural fountain. The range is comprised of three sizes with 15, 20 and 30 fountain jets.