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Sage Earth Sciences, Inc. has obtained a substantial quantity of government surplus industrial HEPA Filtersand Pre-Filters. Our filters are NOS (New Old Stock) in the original unopened box. These massive filters have a variety of potential uses. Here are some applications for which they are specifically designed:

Using a HEPA (High Efficiency Particulate Air) filter, you can construct an air filtration and ventilation system that will remove particles down to 0.3 microns in size. You can