This versatile chamber is used for the drying of small quantities of material in dram vials. Use it on the bench or in the glove box. It can also be used as a tiny vacuum dessicator or storage vessel for solids. The lower vessel has a flat bottom permitting it to be stood upright on the bench or in a glovebox (but we recommend that you clamp the bottom to avoid spills). The top adapter has a 0-4 mm Chem-Cap® valve (release the vacuum slowly to avoid blowing your solid everywhere).