Neodymium Magnet, including the N52 Neodymium Magnet, are customized, also the Neodymium Magnetic assemblies are also customized. The grade we could produce is N35-N52(M,H,SH,UH,EH,AH). N52 Neodymium Magnet is the strongest grade, also is the most expensive. If you need the technical support about the N52 Neodymium Magnet, we could give you t1