Heated Product Shelf Chambers with Valves. For bulk drying and flask drying. Eight ports accommodate both 1/2" and 3/4" flask adapters. Includes 12" dia. acrylic cylinder and base, 10" dia. removable shelves, and temperature probes. Controlled heat settings -20C (-4F) to +50C (+140F). Shelves do not cool. Overall dimensions: 13.5" w x 16.8" d x 14.2" h. Has 8" dia. opening and cap for 3" dia. attachment port.