Zerust plaques are perfect for tackle boxes pistol cases gun cases truck boxes ammo boxes and more.Zerust has proven to be the absolute best way to protect your tackle against rust and corrosion.Molded right into plastic this patented polymer emits a harmless vapor forming a protective layer around metal surfaces.The capsule provides up to 5 years of anti-corrosion protection.Type: ProtectantQuantity: 1Material: PolymerProtects: Against Corrosion/RustSuitable For: Metal