DriBox is a 2" x 2" x 1" dehydrating cartridge that will remove moisture and prevent corrosion in a 3 cu. ft. sealed container. The dark blue Desiccant will turn pink over time, indicating that it is ready to be regenerated. This is a popular item to use in a safe or other sealed container where moisture is a concern. This can be regenerated in a microwave for a few seconds at a time until the beads become dark blue again. An oven can also be used at 225 degrees for 3-4 hours or until the beads are once again dark blue.