This sturdy Secador® desiccator cabinet has a large, wide storage space and provides convenient, reliable dry storage of moisture and UV sensitive products.Durastar® co-polyester construction blocks 99% of UV light and resists staining, crazing and chemical attackRear mounted gas ports accept tubing with 0.25 to 0.38" I.D.Digital hygrometer on the pull down door; patented seal, tab latches, and security loops for a padlockTwo removable, perforated shelves facilitate circulation of dry air; stackable up to 3 units high4.0 models convert from horizontal to vertical orientation with vertical model shelves