Product OverviewCFT-20 Series is a two engine HEPA dust extractor. It is equipped with a main filter as the first and two H13 filters as the final stage. Each HEPA filter is individually tested and certified to have a minimum dust dust with efficiency of >99.99%@0.3μm, which meets the new silica requirements. This professional dust extractor is excellent for building, grinding, plaster and concrete dust.Standout Features Continuous LONGOPAC bagging system ensures quick and dust-free bag changes Smart and portable design, so transporting is a breeze OSHA compliant H13 HEPA Filter Efficient jet pulse filter cleaning Non-marking wheels