Ring rare earth magnet high Br, Hcj & (BH)max, various ... salt test: 24 to 72 hours. Ring rare earth magnet We are well equipped to manufacture these materials ... to customers' specifications. Product Description Material Grade of NdFeB magnet: Magnet N-( N30,N33,N35, N38, N40, N42, ... N38SH, N40SH, N42SH,N45SH), working temperature:150 deg. Magnet UH-( N30UH, N33UH, N35UH, N38UH,N40UH), working temperature ...