VpCI®-101 devices are designed to provide corrosion protection for metal components and parts enclosed in non-ventilated control boxes, cabinets, or tool boxes. A VpCI®-101 device protects up to 1 cu-ft (28 L) in volume. VpCI®-101 is a small patented device from which vapor phase corrosion inhibitors are slowly released. The corrosion inhibitors emit vapors that form a molecular layer on metal surfaces to protect critical, complex and expensive electronic equipment and other metal components during operations, shipping or storage. VpCI®-101 provides long term protection against corrosion even in the presence of adverse conditions including salt, moisture, airborne contaminants, H2S, SO2, NH3 and others.