51 Series Pump Right Cw Rotation Tandem Unit 2 Stages Sae 4 Bolt B Sec 1-15 Spline Shaft With OB Bearing First Stage 1-3/4 Gear Width Gear Housing Blank Inlet PortSplit Flange #20 1-1/4 Outlet Port Bearing Carrier Blank Inlet Port Blank Outlet Port Second Stage 2-1/4 Gear Width Gear Housing Split Flange #32 2 Inlet Port Split Flange #20 1-1/4 Outlet Port Unported Port End Cover Extended Studs Top