450 Gram Silica Gel Desiccant (1 pack) top grade silica gel is contained within a compact corrugated carton. 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. Remove bag from the carton and reactivate the bag full of silica gel. Place the bag in a vented 240 degree F oven for at least 3 hours (or until the silica gel turns blue again). Replace bag inside carton. Note: Do Not remove indicator from carton. It will gradually return to blue after reactivated bag is replaced. The more tightly you can make the storage area being protected, the better your silica gel will work. Silica gel beads are inert and non-toxic. The will Not emit harmful vapors, stain or cause any chemical reaction. Safe to use with foods, medicines, sensitive materials. Dehumidify any space to protect your coins, jewelry, electronics, films, RV's, safes, and so much more. Size: 4.5 x 2 x 7" Protection: 33 cubic feet. Description: Stops condensation Prevents Rust, Mildew, Corrosion and Spoilage Silica Gel"drinks up" moisture,Humidity from within enclosed storage areas,safes, cabinets, cases, ect. Protect your valuables Reactivate Indefinitely Size: 4.5 x 2 x 7" Cubic feet: 33 Qty: 1 UPC: 724225145000 Ships FREE! A great gift idea for any Collector, RV space, ect! Ships FREE applies to the United States Only! 20% restocking fee applies to non-defective returns. This is to cover the original cost of shipping you the item. Items returned must be received in new and unused condition. Returns received in damaged or obvious used condition will be refused.