51 Series Pump Right Cw Rotation Tandem Unit 2 Stages Sae 4 Bolt C Sec 1-1/4-14 Spline Shaft Double Seal Weep Hole First Stage 2-1/4 Gear Width Gear Housing Orb #12 Inlet Port Split Flange #20 1-1/4 Outlet Port Bearing Carrier Common Inlet No Outlet 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