These anti tarnish strips are the perfectly safe and economical way to protect silver, gold, and other metals used in jewellery from tarnish and corrosion during storage, without scratching. They will not harm any metals or gemstones even when in direct contact. Simply insert the Anti Tarnish Strips into jewellery boxes, pouches, or zip-lock bags and let them do the work! Static Intercept anti tarnish strips from Intercept are 1" x 1" pieces of a revolutionary, break-through technology invented and patented by AT and/Lucent Technologies for anti-corrosion/anti-tarnish applications. Intercept reacts with and permanently neutralizes the gases that cause unsightly tarnish.Store your jewellery, silver and other precious metals and keepsake items (metal and non-metallic) in a dry container. Ensure that the items to be stored are clean and place them together with a Static Intercept strip.Please note only physical or chemical cleaning can remove tarnish and oxidation that has already started. Intercept anti tarnish strips should provide protection for your valuables for up to 12+ months of continuous use depending on how well sealed the container is. It is advised that one (1) Intercept Technology's 1" x 1" strip should be, under normal conditions, sufficient to provide protection for the inside of a container that measures 30 cubic inches (to calculate cubic inches, multiply length x width x depth).