... and finally do coating/plating to keep from rusting. Magnets Grade Available 1 . Magnets N-( N35, N38, N40, N42, N45, N48 ... 30EH, 33EH, 35EH) Max working Tempt 200° C ;7 . Magnets AH-(30AH, 33AH) Max working Tempt 230° C . Magnet Coatings ... hardware holder, Magnetic tool Holdings, Receiver etc .Disc magnets or Neodymium Segment magnets have thefollowing important factors :Outer Diameter ,Inner Diameter ...