Review on High-Performance Shop Vac 903 98 Hangup Vacuum Cartridge for Efficient Car Cleaning by Kyle Kriglstein

I use this filter for dry cleaning. I use it with a drywall and random orbit sander dust bag. Otherwise it clogs faster than I have the patience. If it becomes clogged while cleaning coarser materials, you can simply take it out and tap/scrape out the dirt. When I only use the foam boot, fine dust kicks up and settles on items in my garage. Product descriptions on amazon.com can be a little sparse at times, but finding the right filter was fairly easy as the product number matches the number on the ShopVac website. I would be relieved if amazon.com or ShopVac identified this filter as "Type AA" which would suggest a model number based on its visibility on the packaging.