10 brand new MILSPEC dessicant packs, for packing away items for long term storage. Each one is 3 x 6 x 3/8" and protects up to 1.6 cubic feet of air space (if you have an ammo can with ammo in it, there is much less air space left than if it is empty, making just one of these more than adequate for almost all size ammo cans).
Non-corrosive clay adsorbs up to 20% of its weight in water vapor in 6 hours.
These have to be activated before use, this is done in an oven (instructions are printed on every bag) or we like to use a small toaster oven. Once activated seal it up or use it right away, pack it into your airtight container like an ammo can and it will absorb all the moisture in the air and keep your metal goods from being damaged.