For vacuuming household debris, fine dusts and filtering allergens, mold spores and pollen. Captures particles down to 0.3 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.