Magnet Shield is for the protection from the magnetic fields that arise from the magnets, speakers, small transformers and motors. The film is 4” wide and .010 thick and has an exceptionally high magnetic saturation of 21400 gauss and maximum permeability of 4000. It is tin plated that helps it to provide excellent corrosion resistance and better conductivity. Even it can be soldered or painted. The product typically reduces the fields up to s factor of 2 or 3 depending on size and shape of the shield. You can also use it in multiple layers and with the combination of higher permeability alloy such as joint shield for higher attenuation. It is not necessary to anneal this product. It is notified that the magnets will attract the shield. In case of two adjacent magnets, each one should be shielded with a single shield. It is also informed that you may need more than a layer of shielding material, depending on the strength of the magnets.