Short Description: F11 is equipped with a conical pre filter and one H13 HEPA filter. The main filter with 1.7 m filter surface ,each of the HEPA filter is independently tested and certified . TS1000 can separate the fine dust with efficiency >99.99%@0.3μm, ensuring your work space is a clean and safe environment. F11 is recommended for small grinders and hand held power tools. Main feathers: OSHA compliant H13 Hepa filter Efficient jet pulse filter cleaning Smart and portable design, transporting is like a breeze