Our 6" x 8" 2 Mil Anti-tarnish Zipper Locking Bags are perfect for any item that requires cheap long term storage such as jewelry, sterling or silver plated silverware, coins, and other precious metals. These 6" x 8" Anti-tarnish Zipper Locking Bags were developed to protect your jewelry, silver, gold and other precious metals. They provide effective tarnish & corrosion prevention for the following metals: Brass, Bronze, Copper, Ferrous Metals, Gold, Magnesium, Silver, and Tin. These 2 mil zip locking bags are non-toxic, non-abrasive, and do not leave deposits on any item. Keep your silver coins or gold jewelry organized, protected..and tarnish-free. The impreginated plastic neutralizes the gases in the air that attacks and oxidizes silver and ensures a tarnish-free product even when opened and closed numerous times.