HQRP 2 Foam Filter Sleeves for Shop-Vac 950A 950B 970C 970B 984A 984B 991B 90S200 90S250B 92L2S250 92L2S300 24L2S400 24M2S400 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!