Jet Internal, Waterway Cluster Storm with Snap-In diffuser. Black, 2" Textured Scalloped face, with Twin Roto style internal and Adjustable on/off control. Available in additional colors and styles. On May 2, 2011, Waterway made a running change on all cluster storm pulsator jet internals to the new and improved fixed twin roto pulsators internals as shown here. Besides the enhanced look of the new internal, the new eyeball performs and aspirates as well or better than the old design.