Best used with metal items and items containing metal components, the Corrosion Intercept Pouch is a time capsule bag that removes acids from the item stored inside & as they occur over time. We recommend its use with DVD and CD media as well as the usual lapel pins and unknown metal items that folks place inside their time capsules. We offer it in two sizes, 6x9" and 8x10". The photo shows the 6x9" size. Developed by Lucent Bell Labs.