About This The silica gel canister dehumidifier is used for gun cabinets or tool boxes, protect firearms from rust, perfect gun safe accessories, the 360° circular air inlet makes moisture absorption more efficient. The indicating silica desiccant canister can be reused, just place it in a warm oven to reactivate 3 hours at 300F degree if color turns to dark green from orange 200g renewable canister dehumidifier, each one can protect about 15 cubic feet of enclosed spaces Aluminum canister won't rust, silica gel desiccant not contain Cobalt II Chloride Ready to use gun safe dehumidifier when you receive, no batteries or electrical, reactivate for years of use Overview Brand : FULLBOW Floor Area : 1.00 Color : Aluminum Canister, 200G, 3 Units Special Feature : Portable Capacity : 200 Grams Tank Volume : 200 Milliliters Product Dimensions : 3.2"D x 3.2"W x 2"H Recommended Uses For Product : gun safes, cabinets, tool boxes Included Components : 3 Silica Gel Desiccant Dehumidifier Canisters Item Weight : 1.4 Pounds