The CDS-John Blue DP-321009 Gear Box is the ideal component requiring little maintenance and providng the smooth operation of sprayer pumps. The design optimizes the performance of most medium- to large-size sprayers for a variety of applications. This gearbox supports a wide spectrum of pressures and flows for suspensions and slurries useful for standard 3.5 to 5.5 HP gas engines with 3/4" shafts.