This 14" diameter Dacron filter is made by the Shop-Vac Corporation to be used in their commercial and contractor vacuums. Its fabric is very finely woven to prevent being clogged by very fine dusts like soot, plaster dust, etc. It fits on the rim of the dirt container to provide a large area filter. This high performance filter typically is used in conjunction with the standard fanfold filter cartridge. The filter frame #30035-00-0 should be used to prevent this filter from being pulled inward against the cartridge filter.   For similar products see our list of current Shop-Vac Vacuum Supplies. Show Less