National Spencer Rotary Hand Pump w/ Hose and Nozzle 1003 Economy Rotary Pump - fits 15 through 55-gallon drums with 2" NTP bung opening. A rotary vane type pump for dispensing gasoline, diesel fuel, and similar light petroleum products. Heavy-duty cast iron body, dual vanes, and bung adapter. Hose assemblies 2154, 2156, 2158, and 2178 available at extra cost.