Manufacturer says: Protect silver jewelry and antique or collectible coins from tarnish and corrosion. Our protective anti tarnish storage bags are soft and woven with Zerust® anti-tarnish formula that surrounds your valuables and protects them against tarnish damage. The Zerust formula is FDA approved food-safe and can be used to store fine silverware as well as earrings and other jewelry. The formula is non-toxic and residue free, and it makes a great accompaniment to your jewelry gifts. Protects up to 5 years. ***Silver coins not included***
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