Hi, To begin with, I am not a native English speaker and have very limited knowledge regarding magnetic fields and thus want to apologize in advance for probable use of incorrect terms. http://[ATTACH=full]199992[/ATTACH] [ATTACH=full]199993[/ATTACH] In the picture above, M represents a magnet. S is a material that is not allowed to be affected by the magnet M. That is, S is not allowed to be neither attracted nor repelled by M. Therefore, I am looking for a material, F, to place between M and S to prevent S from getting affected by M:s magnetic field either by somehow leading the magnetic field from M around S or to block the field from reaching S (is that even possible?). Furthermore, F itself is NOT allowed to be attracted nor repelled to M by its magnetic field. Currently, I am using a mixture of copper and stainless steel as F. It partly works, but not well enough. I have also tried using a metal known as "Mu-metal" that is supposed to "shield" S. But the problem is that the "Mu-metal" itself is affected by the magnetic field from M. What materials can lead the magnetic field from M around S or block it better than the current one I am using (mixture of copper and stainless steel)? Thank you for your help!