Super Strong NdFeB Manget Ring 1)Suitable for marking small volume magnet with complex shape; 2)Regular shape, precision size,various coating; 3)Strong anti-demagnetization; 4)Grade:N33,N35,N38,N40,N42,N45,30M,33M,35M,38M,40M,30H,33H,35H,38H,40H, 30SH,33SH,35SH,38SH,28UH,30UH,28EH,30EH. 5)Meet the environment standard of ROHS. NdFeB magnet is mainly made from neodymium, iron and boron and other mental element, it is the most powerful commercialized rare earth permanent magnets available today, with maximum energy product ranging from 8 MGOe to 55 MGOe and good coercive force. Widely used in industrial automation, mine, motor, communication, petroleum, magnet separator, medical treatment, Hifi acoustics, computer, Aviation, testing device, electronics and timekeeper ect.