MVC-178A - 3 ft. of flexible hose - fits the DataVac 500W electric blower, etc. - features Relief Valve, that allows you to control suction or blowing power. Works with following Metropolitan Vacuum models: AF-1PG, AF-2PG, AF-3PG, AFTD-1, AFTD-2, AFTD-3, DIDA-1, DIDA-2, DIDA-4, MDV-1, MDV-2, MDV-3, QD-1, SK-1