Kopach Replacement Filter for Craftsman & Ridgid Vacuum (Original Kopach Filter, 6 Pack) This filter will fit most Craftsman and Rigid brand vacuums. The reversible cap is a one time purchase and is required for the Rigid brand vacuums. If you are unsure whether or not this filter will fit your vacuum, please send us a picture of the Search Kopach for 8, 12 and 20 packs to save on your wallet! If you have any questions please contact us through your Amazon home page.