Cortec VpCI-105 emitters are unique devices designed to provide corrosion protection for metal components and parts enclosed in non-ventilated control boxes, cabinets, or tool boxes up to 5 cubic feet (141.6 liters). The VpCI-105 device emits Vapor phase Corrosion Inhibitors (VpCIs), which form a protective coating on all metal surfaces. VpCI-105 is a patented plastic emitter with a breathable Tyvek® membrane through which the corrosion inhibitor is released. It provides long-term protection against corrosion even in the presence of adverse conditions including salt, moisture, airborne contaminants, H S, SO , NH , and others.