Protect your valuables against rust and corrosion. When the moisture control crystals turn pink, recharge unit by placing it in the oven. Unlimited recharges ensure a lifetime of use. Product Features - Protect firearms and other valuables from rust and corrosion. - Desiccant crystals change color when canister needs recharging. - Recharge canister by placing in a 300°F oven until drying granules turn blue (up to 4 hours). - Unlimited recharges, no batteries required. Specifications - Item 95902 - Dimensions: 4" x 5.3" x 4.8" - Desiccant: 750g