Intercept Technology anti-tarnish tabs eliminates the corrosion and tarnish process on the surface of precious metals by reacting with and permanently neutralizing the gases that cause tarnish. Static Intercept ®Tabs will not scratch or harm any metals or delicate gemstones when in direct contact with the tab. To use, simply place your clean jewelry, silver or other precious metal items in a dry, sealed container such as a jewelry box or a pouch and place a Static Intercept ®Tab in the container. The anti-tarnish strip will not remove tarnish or oxidation that has already started only physical or chemical cleaning can do so. Intercept Technology anti-tarnish tabs will protect your valuable pieces for up to 12 months in a sealed container. One 1"x 1" tab will protect containers that measure upto 30 cubic inches. Static Intercept® provides effective tarnish protection for non-ferrous metals such as silver, gold, brass copper and bronze. Static Intercept Tabs® are non-toxic, non-abrasive and temperature and humidity independent. Each package contains 50 1"x1" tabs.