Desiccator plates should be purchased separately. With a bleed valve and an O-ring seal between the dome and the lower portion. The desiccators are suitable for vacuum and are provided with a non-return valve. Hot crucibles should only be placed on a porcelain plate, and should not come into too close contact with the rim of the desiccator. The insert made of PP serves to hold the drying agent. Cat.code : 80230