Beam 11" Drop Down Filter Bag. Since the weight is in the middle of the bag, this bag will self clean when the power unit is turned off. The bag with the weight in it gets sucked into the main canister while vacuuming; however, when the power is turned off, the filter falls down and shakes itself off. This filter is intended to be permanent and will only need to be replaced if it has a tear or hole in it. Filter Bag #110346. (Note that this filter replaces Beam filter 110330).