This Mu-metal Magnetic shielding foil is generous 8" wide by 12" long sheet that is .010" (10 mil) thick. Very flexible and easy to cut with scissors. Used for shielding sensitive electronic devices from unwanted electromagnetic interference. Full magnetic anneal for maximum permeability. Adhesive can easily be applied for mounting. This material is not suitable for shielding permanent magnets. We do not guarantee any shielding performance. Returns are not accepted.