Desiccator (Vacuum) are made of Polypropylene and Polycarbonate. These autoclavable vacuum desiccators can hold vacuum up to 740 mm of Hg for 24 hrs. with out any greasing. The top dome, moulded in rigid and transparent Polycarbonate, gives a crystal clear view of the desiccant placed inside. The Knurled knob on the top provides easy handling of the dome. The lower part is made ofPolypropylene. An internal groove is provided on the flange to hold a silicon rubber Oring. ThePolypropylene stopcock is fit ted with a self lubricating PTEF plug. This plug works three way i.e. vacuum creation, shut ting off & vacuum releasing.