HQRP 4-Pack Foam Filter Sleeve for Shop-Vac 3150, 3200, 3225, 3332, 3332.5A, 3332.5B / 333-80-27, 3333.5, 3333.OH, 3334 Wet Dry Vac Vacuums Coaster HQRP&reg; 4-pack Foam Filter Sleeve Replacement + HQRP&reg; Coaster; Use on filter cage for vacuuming water, for picking up wet messes when used alone. Also required when using reusable disc style filters. Replaces Shop-Vac Foam Filter Sleeve Part # 9058500. Required unless you are using a cartridge filter. 100% Compatible with Original filter. 2 weeks DOA replacement warranty!