Intercept Foam™ eliminates the need for oils, chemicals, and other coatings to protect your precious metal items, musical instruments, firearms and electronics from tarnish and corrosion. Intercept Foam™ is the next evolutionary step for applications such as cabinets, drawers, showcases, instrument cases, compartments, larger boxes etc. Intercept Foam™ has a massive surface area, thanks to its sponge-like properties, which absorbs and neutralizes harmful gases in enclosed spaces and can also be effortlessly integrated within your existing packaging and shipping containers. A color change from copper/dark brown to light grey acts as an indicator that the pad needs to be replaced. Each foam pad measures 2.5" x 3.5" and typically protects 30 cubic feet of enclosed space for up to 1 year. For larger spaces simply add additional pads.