Arc Neodymium Magnet 1.Dimensions: Customized / Produce according to your needs 2.Materials: NdFeB,Grade N35 to N52 (M,H,SH,UH,EH AH) 3.Plating/Coating: Nickel,Zinc,Epoxy and etc. 4.Magnetization direction: Diametrical,Width,Thickness 5.Max operating temp.: 80 to 220 degrees celsius Permanent neodymium magnets are used in place the ferrite magnet in high performance motors. The max temperature resistance of AH series can be achieved 220 degrees Celsius. If you need higher temp. resistance like 250-350 degrees Celsius,we would like to recommend Samarium Cobalt Magnet