These desiccators have a space-saving design that provides for a larger interior volume.  They are light, strong and shatterproof.  Features include:  polypropylene stopcock with Teflon® plug. Ribbed knob for easy lifting, neoprene O-ring (unaffected by low temperatures down to 0°C), and perforated plate (1/8" thick with 1/8" diameter perforations for air transfer).  Vacuum line connects to top section, leaving the lower section free to be moved.  Valve takes 5/16" to 3/8" I.D. tubing.  Will hold vacuum of 29" of Hg for 24 hours.  Two styles to choose from: clear polycarbonate top with white polypropylene base; and all clear polycarbonate design.  The polypropylene base model provides excellent chemical resistance, while the all clear polycarbonate model provides excellent viewing capabilities.