Amazon.com: IN VACUUM 2 Pack Replacement for Shop Vac Filter 90398, 903-98, 9039800, 903-98-00, 952-02H87S550A, Hangup Wet Dry Vacuum Cartridge Filter, Fits Most for Shop Vac 4 Gallon and Less : Tools & Home Improvement
GIB cleaningtool iSH09-M518617mn Filter Replacement for Shop-Vac 90398, 903- 98, 9039800, 903-98-00 Type AA Wet/Dry Vacuum Cartridge Filter
Shop Vac Filter Cartridge 9030400 – Vacuum Direct
Cartridge Filter for Shop Vac 903-98 90398 9039800 903-98-00 Type AA Wet/Dry | eBay