### Polypropylene lower section with polycarbonate cover. A neoprene 'O' ring sits in a groove in the base unit to provide an excellent seal with the cover. The desiccators will hold a vacuum of 740mm of mercury (29"") for 24 hours (loss not exceeding 20mm/Hg). A removable pan holds calcium chloride or other drying agent.

### Polypropylene lower section with polycarbonate cover. A neoprene 'O' ring sits in a groove in the base unit to provide an excellent seal with the cover. The desiccators will hold a vacuum of 740mm of mercury (29"") for 24 hours (loss not exceeding 20mm/Hg). A removable pan holds calcium chloride or other drying agent.