Cleans, scrubs, filters, and purifies the air inside a 3d printer that prints with ABS. This 3d printed activated carbon recirculating air filter removes all toxic fumes. Used together with my activated carbon exhaust filter, your 3d printer room should smell as fresh as a spring day in the woods. This recirculating air filter has been tested and it works great. In addition, I am currently testing my 3d printed exhaust filter. After I finish testing the exhaust filter in a couple of weeks, I'll post it exclusively on 3dPrintFileMarket.com. Enjoy! 3d Print File Market is not just another 3d printing website. It is the home of The Original Technology Accelerator App that will change the world.Bill of Materials I. Activated carbon - the pellets you find in pet stores for filtering aquarium water. II. 40 mm fan III. 12 volt power supply IV. Velcro (TM)