multi-pole 6 poles magnet ring for rotors custom size&grade&coating 1.Material of NdFeB magnet: Magnet N-( N30-------N52), working temperature:80 ... -(N28AH, N30AH, N33AH), working temperature:220 degree Celsius.2.3.Magnet shape: Block,Ring, Arc,Disc, Cylinder, Rod,Bar, Cube,Sphere ... etc.4.Samples are available, welcome your inquiry. CiYan Magnet is your reliable partner. multi-pole 6 poles magnet