21 Series Pump Right Cw Rotation Tandem Unit 2 Stages Sae 2 Bolt B Sec 7/8-13 Spline Shaft With OB Bearing First Stage 1-1/4 Gear Width Gear Housing Orb #16 Inlet Port Orb #16 Outlet Port Bearing Carrier Blank Inlet Port Blank Outlet Port Second Stage 1-1/4 Gear Width Gear Housing Orb #16 Inlet Port Orb #16 Outlet Port  Unported Port End Cover Extended Studs Top