Tupu ị jụọ ajụjụ, biko nye ozi ndị a ka anyị wee mara ezigbo mkpa gị nke ọma:
1.Nha
2.Size ndidi
3.Magnetic ọkwa(35-N52(M,H,SH,UH,EH,AH))
4. mkpuchi (Zn, Ni, Epoxy, wdg)
5.Magnetic ubi direction (Axial, Radial, ọkpụrụkpụ, wdg)
6.Ọtụtụ
7.Ebe ma ọ bụ kedu ka ị ga-esi jiri magnet