Corrugated carton has a built-in indicator that turns from blue to pink to signal when to reactivate. Reactivates easily in a conventional oven. Ideal for small safes, display cabinets, etc. Protects 15 cubic feet of enclosed space.

The silica gel visible through the inspection window will turn from blue, pinkish/orange to clear. Mini Canister: When it becomes clear, place the unit in 300 degree over for at least 3 hours.
Large Canister: When it becomes clear, place the entire unit in 325 degree over for at least 3 hours.
Small, Medium & XL Pack: When it becomes pink, remove silica bag from unit and place the bag in a 240 degree over for at least 3 hours.