Block N55 Neodymium Magnet 1.Dimensions: Customized / Produce according to your needs 2.Materials: NdFeB,Grade N55 3.Plating/Coating: Nickel,Zinc,Epoxy and etc. 4.Magnetization direction: Through thickness,width,or length 5.Max operating temp.: 80 degrees celsius It can be very small block/cube,or it can be big block/bar and become a very powerful magnet.They are often used for industrial applications.