ATD 5080 Plastic Lever Action Barrel Pump, 1 Pack Built-in 2" bung adapter allows the pump to be fixed on Drums with 2" opening. Pump position can be adjusted using the lock nut incorporated in the pump body Pump outlet is fitted with an air vent cap which when loosened breaks the siphon action Comes complete with suction tube for use with 15-55 gal. Drums and a 6.5' x 3/4" flexible corrugated discharge Hose