Hornady XL Canister Dehumidifier - Protect your valuables against rust and corrosion with the Hornady Canister Dehumidifier. When the moisture control crystals turn pink recharge unit by placing it in the oven. Unlimited recharges ensure a lifetime of use. Protect firearms and other valuables from rust and corrosion Desiccant crystals change color when canister needs recharging Recharge canister by placing in a 300 degrees F oven until drying granules turn blue (up to 4hrs) Unlimited recharges no batteries required. Fireproof Weight: 2.5lbs Exterior dimensions: 9.5in X 8in X 5.5in