The Benchtop Fume Hood is an economical unit designed for small facilities or installations in which a number of fume hoods are needed. Excellent for use in schools, junior colleges and universities. Features include a one-piece shell molded of chemical and spark resistant polyethylene with rounded inside corners for easy cleaning. A clear acrylic panel slides on a track featuring stop pins for open, closed or intermediate positions with a gap at the bottom for continuous air flow. The front opening is 30cm (12") high x 56cm (22") wide. The exhaust duct is stepped for use with either a 12 or 15cm (4" or 6") diameter duct. An exhaust system capable of drawing 200 cfm (free air) is recommended. Overall dimensions are 69 x 33 x 56cm (27" x 13" x 22") high. Shipping weight 17 kg. (38 lbs).