The new Nelson R55 VT uses a patented variable torque speed governing system that allows the plate to maintain a constant rotation speed across a broad range of nozzle sizes and pressures.  This new design also incorporates snap-fit nozzles, eliminating the need for a retaining pin. The inverted R55i VT, with a specifically engineered green plate, is easier to install and it’s effective in helping manage debris that collects at the end of the system.  Click here for performance details and product page.