Amazon.com: Replacement Cartridge filter fits for Hart Standard VACUUM FILTER Fit HART Most Shop-Vac Wet/Dry Vacs 5 to 16 Gallon-1pack (yellow) : Tools & Home Improvement
HART Filter K-22µ
Hart Cartridge vacuum FILTER Fit HART Most Shop-Vac Wet/Dry Vacs 5 to 16 Gallon | eBay