Dustless 12-18 Gal Wunderbag Micro Pre-Filter - 2 Pack

Turn your generic shop vacuum into a dustless one! Wunderbag Micro Pre-Filters are designed with a universal opening that fits most brands of 12-18 gallon shop-type vacuums, as well as a flexible gasket which easily accepts vacuum ports ranging from 2 to 2 3/4 inches in diameter.  Add extra filtration to contain 87% of particles at 0.5 microns, including water and slurry up to a total of 40 pounds. After cleaning, seal the pre-filter for safe disposal of hazardous material such as silica, lead, asbestos, and hexavalent chromium.  Continue reading below for instructions on how to properly install this pre-filter.