Choice of white polypropylene or clear polycarbonate bottom
The space saving design of the desiccator dome provides maximum interior clearances. This strong, shatterproof desiccator with extra heavy walls will hold a full vacuum (29.9" Hg or 759mm]) at room temperature for 24 hours and will remain air tight even if not under vacuum. Features a polypropylene stopcock with a PTFE TFR plug which turns, allowing a slow, gentle entrance of air preventing unnecessary turbulence and crucible damage. The stopcock handle is a highly visible red and has a port which accepts 1/4" (6.4mm) I.D. tubing. Has a large ribbed knob at the top center for easy lifting and a neoprene O-ring seal which does not require grease, but is not harmed if grease is used. Has a polypropylene plate 3.2mm (1/8") thick with 3.2mm (1/8") diameter perforations for air transfer. The plate rests on the retaining ledge of the bottom section and has a center hole for easy removal.