Piston Pump - fits 15 through 55-gallon drums with 2" bung opening. A double acting piston pump for dispensing gasoline, diesel fuel, and similar petroleum products. Carbon steel and aluminum telescoping tube assembly (22" to 39"), 8 ft. hose with straight through discharge nozzle. 3/4” NPT inlet and outlet. Delivers approximately 1 gallon per 10 strokes