The Hakko FA430-16 is a volume fume extractor unit with pre-HEPA and maximum 2 ports/2 stations, no arms, 120W. Inside the unit, two filters, comprising three stages of filtering, remove the contaminants from the air. The purified air is then returned to the area where the Hakko FA430-016 Volume Fume Extraction Unit is located. - The pre-filter removes coarse particles, such as dust, thus extending the life of the main filter. The main filter provides the greatest amount of surface area within the volume of the filter case. The standard filters contain an activated carbon element built into the filter. This filter is designed to last the life of the main filter.