3M™ Metal-In Static Shielding Bag 1900 is an economical alternative shielding bag for less demanding applications where testing and reusing bags are not prime considerations. Aluminum is vapor-coated on half-mil polyester. This shielding layer is bonded between the polyester layer and a static-dissipative polyethylene inner layer. The bags are amine-free, non-corrosive and meet EIA-541 definition for static shielding/dissipative packaging.