For vacuuming household dirt and debris, and fine dust like cold ashes, cement dust and drywall dust. Captures particles down to 1 micron in size. Fits all Vacmaster Wet/Dry vacs 5 gallon to 16 gallon (excluding models VWM510 & VFB511B 0201). Fits most Shop-Vac Wet/Dry Vacuum Cleaners (5 gallon and larger).* *This is not a product of, nor is it sponsored or endorsed by Shop-Vac¨. Shop-Vac¨ is the registered trademarks of the Shop-Vac Corporation.