1. VCI Emitter is a kind of porous plastic shell with built-in VCI agent and adhesive backing, which is suitable for metal antirust in enclosed space, especially in clean environment. 2. The protection metal types are ferrous metal, copper and its alloys, aluminum and its alloys. Suitable for rust prevention in electrical cabinet; 3. VCI Emitter is suitable for rust prevention of hard to reach metal surfaces such as deep holes, thin pipes, twists and cracks.