anti-tarnish zip top bag 2" x 3" (package of 10) jewelrysupply size: 2" x 3"<br/>perfect for smaller items that require affordable long term storage solutions for any product that may tarnish. these bags now contain a translucent film on both sides of the bag to allow thorough viewing of your item inside. protects items from tarnish for up to 3 years. effectiveness indicator these bags feature a translucent copper colored that will turn black indicating it is time to change the bag. works on all metals this anti-tarnish bag provides tarnish prevention capabilities for non-ferrous metals like silver, gold, brass, copper and bronze, as well as ferrous metals. no chemicals needed each bag is non-toxic, non-abrasive, resistant to humidity and temperature changes and will not release corrosive gases like other charcoal-based tarnish prevention products.