UL Listed for Safety ,The High Flow Hand Pump is a premium double diaphragm hand pump that is reliable and versatile. For high-volume transfer, use the high handle position 50 gpm: this pumps generates twice the flow of other hands. For heavier fluids or for easier pumping, use the second stroke setting 25 gpm. In either handle position, expect economical, trouble-free operation for use with Petroleum products like oil up to 30wt,Diesel fuel, gasoline, kerosene, hydraulic fluids, E15, B20 fuels also. This pump fits a 2 inch NPT bung. Includes 3/4 in. x 8 ft. (2.4 m) Buna-N® hose, thermoplastic nozzle, and adjustable suction pipe with static wire hose and metal spout. Or for easier pumping, use the second stroke setting.