Our PreservAll Ammo storage bags (6"x6") made with our Corrosion Intercept polymers keep your ammunition safe and corrosion free, protected from rust. Simply place your clean ammo inside the bag to protect it for up to 3 years! No more corroded ammo wasted due to rust and corrosion. The bags do not emit any chemicals or oils, are completely safe, non-toxic, recyclable, environmentally friendly, and best of all: 100% Made in the USA! With their built in saturation indicator, after approx 3 years the bag will begin to corrode, letting you know it's time to change the bag!