CSS-SORB is an extra high efficiency silica gel that has exceptional characteristics of adsorption and desorption qualities in the 30 – 50% RH range. The mechanical properties of CSS-SORB are comprised of smooth silica gel beads approx. 1/8" (2.5 - 5.0mm) in diameter with a mean pore diameter of 30 angstroms. Dry CSS-SORB has an as shipped RH of approximately 1-2%. For a weight to volume reference, the bulk density of CSS-SORB is 47 lbs. per cu ft. or approx. 6 lbs. to a one gallon container. CSS-SORB BAGS are available in the DRY form or preconditioned to the following relative humidity: 5%, 10%, 15%, 20%, 25% and 30%.