1"x 1" Static Intercept? Non-Abrasive Anti-Tarnish Tabs. Intercept Technology anti-tarnish tabs virtually eliminate corrosion and tarnish of precious metals. Static Intercept ?Tabs will not harm any metals or gemstones even when in contact with the tab (not even opals, emeralds, or pearls). Simply place your jewellery, silver or other precious metal items in a dry container such as a jewellery box, pouch or zip-lock bag and place a Static Intercept ?Tab in the container. Intercept Technology anti-tarnish tabs will protect your items for upto 12 months in a sealed container. One 1"x 1" tab will protect containers that measure upto 30 cubic inches (approx 490 cubic cm ). 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. Intercept Technology does not leave deposits on items it protects. Sold in bags of 100.