For Ridgid VF6000 5 Layer HEPA Filter 5-20 Gallon Wet & Dry Vac Vacuum Cleaner | eBay
Amazon.com: Ridgid VF6500 Filtration Set – Twin Pack of Dust Bags and HEPA Media Filter for Ridgid Wet / Dry Vacuums
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