... earth material Product DescriptionMaterial Grade of Ring NdFeB magnet: Magnet N-( N30,N33,N35, N38, N40, N42, N45, N48, N50,N52), working temperature ... :80 deg.Magnet M-(N33M,N35M, N38M, N40M,N42M, ... , N35SH, N38SH, N40SH, N42SH,N45SH), working temperature:150 deg.Magnet UH-( N30UH, N33UH, N35UH, N38UH,N40UH), working temperature:180 ...