55 Series Pump Bi-Rotational Single Unit Sae 2/4 Bolt B Short Sec 7/8-13 Spline Short Shaft Without OB Bearing 2-1/2 Gear Width Gear Housing Npt #24 1-1/2 Inlet Port Npt #24 1-1/2 Outlet Port Port End Cover Npt #24 1-1/2 Rear Inlet Port Npt #24 1-1/2 Rear Outlet Port Extended Studs Top