It's a 12 x 5mm Neodymium Magnet in cylindrical shape. Neodymium cylindrical strong magnet is very  useful for hanging or holding. neodymium magnet are also known as NdFebB magnets or Neo magnet and it is made from an alloy of neodymium, iron and boron. It has excellent magnetic property and are extremely strong and  small size. This  magnets are permanent, and have a high maximum magnetic energy. This magnet generally used for speaker, receiver, microphone, alarm, stage audio, car audio, MRI scanners, medical equipment, magnetic health products and so on.

Specification