... ring,block,tile, size:according to your need Micro Motor Magnet mainly comprised of neodymium ,iron and boron,is the third generation ... permanent magnets in the world up to date,It has excellent properties of high remanence,coercivity,and Max.energy product. Micro Motor Magnet ... slide however). Pretty strong hold between two of these even with a couple of mm in between.Cons: Would like thicker (and more ...