Get non-abrasive, nontoxic, environmentally friendly tarnish protection for up to 3 years with these anti-tarnish bags. Each bag utilizes Lucent Technologies patented Corrosion Intercept® polymers that react with and permanently neutralize atmospheric gasses that cause tarnishing of metals. Does not contain charcoals, oils, or volatile corrosion inhibitors. Does not leave deposits on items it protects, will not harm gemstones, is temperature and humidity independent, and breaks down to a polymer dust in a landfill.Details:4"x 4"10 bagsNon-abrasive and nontoxic