Build from sturdy steel canisters this product is ideal for your Gun Safe, Ammo Storage, Boats, RV's, Closets, Cabinets, etc. It's built-in indicator will turn from Orange to Dark Green signaling a need for reactivation. It can be reactivated in the oven and reactivation instructions are right on the unit. Using top grade orange indicating silica gel in a compact and portable aluminum canister makes it one of the most versatile desiccant products on the market that is easy to reactivate. Dry-Packs Dehumidifier Canister provides a lifetime of protection for your gun case, ammo storage, electronics, camera bag, shoes, tool boxes, cabinets, drawers, tackle box, backpacks, camping gear, RV's, trailers, storage bins, coin collections, craft supplies, etc.