Big jewellery collection? Pick up a pack of our anti-tarnish bags and store all your jewellery safely inside to avoid tarnishing. Our incredible bags use semi-conductor technology to transform plastics into a protective reactive barrier against corrosive gases which stops the air from corroding the metal which in turn causes them to tarnish. This means Intercept literally reacts with and permanently neutralizes these gases that cause unsightly tarnishing stains! This pack of 10 have zip locks and are 2x3 inch in size. They bags will last up to 10 years and if they are kept sealed in their original packaging or other sealed container, the bags will start working as soon as you put your jewellery inside.