In the field of fluid jet devices, infinite variations may be made to a few standard basic shapes; and these variations are the actual tool that allows for performance and efficiency of the device itself.

Due to the complex rules of fluid dynamics, altering the internal geometry, or the external measurements, of a device alters its performance as well. This way, a device's performance may be maximized at the same input pressure, or energetic costs of an industrial process may be drastically reduced; similarly, the right choice of materials in the construction of a fluid jet device makes it suitable for operating with particular fluids.