The Shop-Vac® Reusable Dry Filter with Mounting Ring must be used in combination with a 90585 foam sleeve. Save money and another trip to the local store with these economical, reusable disc filters. Just wash and reuse, again and again. Comes in a package of three with easy to use mounting ring for pick up of larger debris and dry material. These filters fit's Shop-Vac® brand wet dry vacuums 5 U.S. gallon* (18.9 litres*) and above; except 5 U.S. gallon* (18.9 litres*) portable model H87S, 5 U.S. gallon* (18.9 litres*) HangUp®, 5 U.S. gallon* (18.9 litres*) Wall Mount and 6 U.S. gallon* (22.7 litres*) long life model P12S Vacuums.