Desiccator, Non Vacuum (L.S.E) These autoclavale desiccators are made of polypropylene (PP) and Polycarbonate and can hold vacuum up to 740mm Hg for 24 hours without any greasing. The PP stopcock has a self-lubricating PTFE plug that works to create the vacuum, shut it off and release it. Non-vacuum (Plain) desiccators are physically the same as vacuum desiccators. Only difference is the absence of stopcock. Grease should be applied on the glanges to make it air-tight. 6 Qty :