HQRP 4-Pack Foam Filter Sleeve for Shop-Vac 8040, 8045, 8045A, 8050A, 500M, 500X, 5010, 5015, 5020, 5025, 5275 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!