HQRP 2 Foam Filter Sleeves for Shop-Vac BLB350, BLB450, BLB550, BLB650, BMB200, BMB250B, J150A, J200A, K250, KA450, E87R250B 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!