Vaccum dessicator 250mm made of Polypropylene and Poly-carbonate, This autoclavable vaccum desiccator can hold vaccum upto 740mm of Hg for 24 hrs. without any greasing, The top dome, moulded in rigid and transparent Poly carbonate, gives a crystal clear view of desiccant placed inside. The Knurled knob on the top provides easy handling of dome. The lower part is made of Polypropylene. An internal groove is provided on the flange to hold a silicon rubber O-Ring. The Polypropylene stopcock is fitted with a self lubricating PTFE plug. This plug works three way i.e. vaccum creation, shutting off & vaccum releasing.