... NdFeB arc Magnet Grade: 35-50(N, M, H, SH) Coating: Zn, Ni, NiCuNi, Epoxy, Parylene, Etc. ISO9001:2008 1. Physical Properties ... RingOuter DiameterInner DiameterThicknessMaximum220.00mm80.00mm50.00mmMinimum1.00mm0.60mm0.50mm Segment, Arc and other irregular shapes can be made according to customer ...