The 4 quart paper bags are designed for the Lindhaus Healthcare Pro series uprights. These uprights have the hose or wand along the left side outside of the bag chamber. The nozzle connector is centered at the bottom of the vertical body. The Filtrete exhaust filters measure 5 1/2" x 4 1/2". One filter fits in a frame which is covered by a lid on the front of the vacuum's main body.
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Lindhaus Vacuum Supplies.