This fanfold cartridge filter provides a large filter media area for dry pickup. It is 6 5/8" high with a steel enclosure plate on one end and a thick rubber seal on the open end. A metal grill around the inside reinforces the filter media. The seal has a 7 3/16" outside diameter and 5 3/4" inside diameter. For a larger diameter filter cartridge that is open at both ends, see the Shop-Vac Cartridge Filter #903-9800.
This thick foam filter is designed to be used in most wet/dry utility vacuums. It is a sleeve measuring 6 1/2" high and about 4 1/2" in diameter made of 1/2" thick foam rubber. Generally, this foam filter is used instead of a fanfold cartridge filter for wet pickup although it is sometimes used for dry pickup when covered with a paper or reusable fabric filter.
This package contains three reusable dry filters and one filter retainer ring designed to be used in wet/dry utility vacuums made by Shop-Vac Corporation. One is placed over the thick foam filter and the ring slides over it to hold it in place. These are used to provide greater filtration than the thick foam filter alone.