55 Series Pump Bi-Rotational Single Unit Sae 2/4 Bolt B Short Sec 7/8-13 Spline Short Shaft Without OB Bearing 2 Gear Width Gear Housing Npt #20 1-1/4 Inlet Port Steel Plug Npt #20 1-1/4 Outlet Port Steel Plug Port End Cover Npt #24 1-1/2 Rear Inlet Port Npt #24 1-1/2 Rear Outlet Port Extended Studs Bottom