LifeSupplyUSA 5 in. x 7 in. x 9 in. Replacement Filters for Shop Vac Craftsman 17816, 9-17816 Wet/Dry Air Vacuum, 5 Gal. & Larger 5-Pk 5ER123 - The Home Depot
MULTI FIT Standard Replacement Cartridge Filter for Most Shop-Vac Branded Wet/Dry Shop Vacuums (3-Pack) VF2007A - The Home Depot
Craftsman shop vac filter 17816 with cap - Shop Vac Filter
How to Clean a Shop Vac Filter - Bob Vila
Amazon.com: Shop-Vac 9034033 CleanStream Gore High Efficiency Cartridge Filter, Fits Wet Dry 5 gal. Shop Vacs, (1-Pack) : Everything Else