10" dia. X 18" L. Cartridge filter, 5" Cincinnati Fan model pb-9, S/N 700443-1, cast aluminum centrifugal blower driven by a Leeson washguard 1/2hp, 3450 rpm, direct drive motor. Collector housing is 18"sq. X 36" H. W/8" dia. Bottom inlet and removable front access panel. Includes control panel and timer enclosure. Previously used to vent a bulk bag unloader.