CRAFTSMAN CMXZVBE38740 1/2 Height HEPA Media Wet/Dry Vac Replacement Filter for 3 to 4 Gallon Shop Vacuums - Amazon.com
Amazon.com: HQRP HEPA Cartridge Filter compatible with Shop-Vac wet/dry vacs 5 gallons and above (except 5 gallon portable model H87 Series and Hang Up vacs) : Home & Kitchen
Shop-Vac Ash Vacuum HEPA Cartridge Filter, Type NN, Model 9032933 - Walmart.com