The Large Desiccant is used to prevent moisture damage that may occur in electronics. The plastic tube is filled with 22 grams of replaceable indicating desiccant. Indicating desiccant gradually changes color as it becomes saturated with moisture. The Large Desiccant is designed to protect the vented RuggedCable System, instruments, and battery packs deployed in high-humidity environments or infrequently maintained sites. Desiccates 20 times more than the storage desiccant.