Jet Internal, Waterway Poly Storm with Snap-In diffuser. Stainless Steel and Gray, 4" Large Smooth face, with Roto style internal and Adjustable on/off control. Available in additional colors and styles.On July 19, 2011, Waterway made a product change to all Roto and Twin Roto Storm jet eyeballs to fix the eyeballs in the desired “spin” orientation. The older eyeballs were made adjustable, where the spa users would have to position the eyeballs in the correct position to make them spin. The aesthetics of the jets remain near the same.