The Benchtop Fume Hood fits into an area too small for many other fume hoods. It is an inexpensive unit designed for small facilities or installations in which a number of fume hoods are needed. Features include a one-piece shell molded of chemical resistant polyethylene. Inside corners are rounded for easy cleaning. A clear acrylic panel slides inside tracks with stop pins for open, closed or intermediate positions. The front opening is 12" x 22" Three holes below the panel allow continued air flow when the panel is closed. The exhaust duct is stepped so that either a 4" or 6" diameter duct may be used. Overall dimensions: 27W x 13D x 22" high. Weight: 38 lbs. Bel-Art.