VpCI®-143 Paper Emitters are fully recyclable/repulpable neutral natural kraft linerboard squares coated with VpCI® coating on two sides for fast Vapor phase Corrosion Inhibitor protection. These VpCI® coated linerboard emitters do not contain nitrites, phosphates, silicates, or other hazardous compounds. They can be inserted into a package to provide superior corrosion protection to both ferrous and non-ferrous metals. Use approximately one 1 x 1 inch (6.45 cm2) emitter for every 25 cubic inches (410 cm3) of void space needing protection.