***DISC***905-85-1 FOAM FILTER SLEEVE***DISC*** | Use the Shop-Vac foam sleeve for picking up wet messes when used alone. The foam sleeve is also required when using reusable dry filters. The approximate size of the foam sleeve is 8 in Dia and 6-1/2 in H. The foam sleeve is required unless you are using a cartridge filter. It fit's Shop-Vac brand wet dry vacuums 5 gal and above (except 5 gal portable model H87S, 5 gal HangUp, 5 gal Wall Mount and 6 gal long life model P12S vacuums).