... N-( N35, N38, N40, N42, N45, N48, N50,N52), Magnet M-(35M, 38M, 40M, 42M, 45M, 48M), Magnet H-(35H, 38H ... , 30EH, 33EH, 35EH) Magnet AH-(28AH,30AH,33AH)4.Coating: Nickel ,Zn,Black Epoxy,Ag,Au Etc5.Max working Temp:80 ... Sea or Air or Courier, kinds of transportation are available Nickel coating Neodymium disc Magnet