HQRP 2 Foam Filter Sleeves for Shop-Vac 87L350, 87L400, 87L450, 87L500A, 87L600, 87L600C, 87L650, 87L650C, 87P350, 87P500A, 87P600A, 87P650C Wet Dry Vacuums + Coaster HQRP&reg; Foam Filter Sleeve + 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 / 905-85-00 / 90585. Required unless you are using a cartridge filter. 100% Compatible with Original filter. 2 weeks DOA replacement warranty!