Use these boxes to protect your valuable CD (compact disks) collection from harmful ozone, UV light, mold, mildew, and electronic discharge. Boxes are constructed from acid and lignin free 55pt board, with a 2 piece shoe box style construction and metal reinforced corners. Dimensions are 10" x 6 1/4" x 6". It is recommended that CD storage be supplemented with Corrosion Intercept Inserts to extend longevity. These are thin disks that sit behind the CD in its jewel case, to absorb harmful gases that cause deterioration.