Small-Desktop-Fume-Cabinet-Bench Vent-BV570H-p-This-fume-cabinet-is-a-small-desktop-unit-that-is-ideal-for-use-within-dental-labs-design-technology-workshops-pharmaceutical-labs-&-other-areas-of-the-classroom-&-workshop-Filtration-is-carried-out-by-a-15-to-20-micron-pre-filter-followed-by-a-3-5kg-high-grade-bonded-carbon-filter-for-hydrocarbon-organic-solvent-gas-adsorption-It-is-this-process-of-filtration-absorption-&-dilution-that-vastly-reduces-or-eliminates-operator-exposure