The x164 Shotgun Shell 20G Long Term Storage Ammo Case by Case Club holds the ammo in a tough, airtight case that is unmatched for transportation & long term storage. This insert securely holds the shells in a stacked 2 level system for maximum capacity. A crucial aspect of keeping ammo in good condition for long periods of time is to make sure the ammo stays in a dry environment. Long exposure to humidity will absolutely wreck ammunition through corrosion whether it is brass, steel, or even aluminum. To prevent corrosion, the ammo needs to be stored in a dry environment, and to that end Case Club has included a dedicated Silica Gel Canister with the case that will suck up moisture from the air inside the case. This will ensure the ammo is dry and therefore will last as long as possible. The silica gel canister can even be recharged in the oven if it reaches saturation. This case was engineered to have your ammo last a lifetime and to be the next level in long term ammo storage. The case itself is guaranteed for life against breakage & defects so you know your ammo will be safe from harm. Protect your investment, buy Case Club!