Dry-Packs 40gm Indicating Silica Gel Aluminum Canister, Pack of 2 Dry-packs sturdy aluminum canister easily reactivates so you can reuse over and over again Indicating window turns orange to dark green when canister needs reactivating Portable, electric free and easy to use retail price $12100 Item weight 2 ounces - approx 4-inch by 2-inch by 1/2-inch