The Hydrosorbent Silica Gel Dehumidifier will help keep your gear nice and dry in humid environments to protect from fungus and mould. The Silica Gel is enclosed in an aluminium canister and it will protect 3 cubic feet of space. This is most suited for use in smaller areas such as gun safes, lockers, wardrobes, closets, bags, suitcases, electronics or lens cases. Our Hydrosorbent Silica Gel Dehumidifier has an indicator that will change colour when it needs to be reactivated, and you can reactivate by putting it in the oven at 120 degrees Celsius for 3 hours. Drinks up dampness from within gun safes and other enclosed storage areas, protecting firearms and other valuables from condensation, rust and mildew.