Diaphragm Pump - fits15 through 55-gallon drums, or tanks with 2" bung opening. A double acting diaphragm pump for dispensing gasoline, diesel fuel, and similar petroleum products. Steel and aluminum telescoping tube assembly (22" to 39"), 8' hose with straight through discharge nozzle, 3/4” NPT inlet and outlet. Delivers approximately 1 gallon per 8 strokes.