Simplicity vacuum filters for the Simplicity Series 6 Upright vacuum models 6600, 6670, 6900, 6970, Simplicity 6000 Series - models 6100, 6370, 6400, 6550, 6570, Simplicity Commercial model 6870. 2 Simplicity filters in each package.  Filters made by Simplicity. Simplicity Electrostatic post filter # SF6-2.