The Hornady Reusable Silica Desiccant Dehumidifier Bag prevents moisture damage in gun safes, cabinets, and other enclosed areas. With the ability to recharge the bag in a warm oven, you can use it over and over again to keep your firearms safe. Features450 grams of rechargeable desiccant (will turn pink when recharge is needed)Convenient size for gun safes, cabinets, or other enclosed areasA must for humid climates