... :2008 2. Shape: Ring, Arc, Block, etc 3. Coating: Ni, Zn, etc wind turbine generator NdFeB magnets place of origin shenzhen ... numbern35-52,33m-50m,30h-48h,30sh-45sh ,30eh-40ehcoatingNi, Zn, gold, copper, epoxy and so onapplication industrial magnent,mini-motor ...