55 Series Pump Bi-Rotational Single Unit Sae 2/4 Bolt B Sec 7/8-13 Spline Shaft With OB Bearing 2 Gear Width Gear Housing Npt #20 1-1/4 Inlet Port Npt #20 1-1/4 Outlet Port Port End Cover Npt #24 1-1/2 Rear Inlet Port Npt #24 1-1/2 Rear Outlet Port Standard Studs