The Liberty GR20 is a GR20-Series guide rail base for Omnivore grinders, fitted for LSG- and LSGX-Series pumps — all cast iron, with a single guide-pipe design with an auto-align feature, 1-1/4" FNPT guide pipe and discharge threads, and a powder coat finish for corrosion resistance. Includes a mating flange, an upper rail support bracket, stainless steel bolts, and a heavy nitrile sealing grommet.