Top grade dessicant silica gel is contained within a compact aluminum canister. Provides lifetime protection and has a built-in indicator that turns from blue to pink to signal the need for reactivation. Easy to reactivate in any oven. Covers 3 cubic ft

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.