The Hydrosorbent 40 Gram units provides protection for cases containing guns, cameras, telescopes and musical instruments. Also, ideal for tool & tackle boxes and silver drawers - any small storage area. 

The mini canister contains 40 grams of silica gel in a compact aluminum canister that measures 4" x 2" x ½", about the size of a deck of cards. Protects 3 cubic feet of enclosed space and has an indicator window that has Blue silica gel that turns pink when saturated to give you a visual indicator of when this unit needs to be reactivated. Detailed instruction are provided on the outer package and embossed on the canister.