This Eisco Labs 15cm (5.9") Vacuum Desiccator features a heavy-duty borosilicate 3.3 glass chamber and lid with a porcelain sieve plate. The airtight design holds a full vacuum (740mm Hg at 20cm) at room temperature for 24 hours. Vacuum desiccators dry and store moisture-sensitive materials under reduced pressure. The porcelain sieve plate supports samples above the desiccant. Suitable for analytical chemistry and research laboratories.