This ferrite ring magnet weighs 406g, is uncoated, and has a pull force of 3.9 kg. GradeY30BH. It has an outside diameter of 100mm, an inside diameter of 60mm, and is 17mm thick. 

Ferrite loudspeaker magnets play a crucial role in the functioning of a loudspeaker by creating a magnetic field for converting electrical signals into sound. The ferrite ring magnet is like the secret ingredient in the loudspeaker, a specialized magnetic component integral to the speaker's performance. Its role is to create a stable magnetic field that interacts with the voice coil, converting electrical signals into mechanical vibrations that produce sound. The specific dimensions and magnetic characteristics of this magnet make it highly efficient in this role. It is one of our larger loudspeaker magnets. Its Y30BH grade indicates a high-quality ferrite material that provides strong and consistent magnetic fields necessary for high-fidelity audio reproduction. 

The uncoated nature of the magnet helps in maintaining the raw magnetic properties without interference from coatings. The direction of magnetization through the height of the magnet ensures that the magnetic field is optimally aligned with the voice coil, enhancing the efficiency and clarity of the sound produced. The ferrite ring magnet can securely interact with the other components of the speaker without dislodging, even under high-frequency vibrations.  

Beyond loudspeakers, this ferrite ring magnet's dimensions and properties make it useful in other applications requiring stable and precise magnetic fields. It can be used in magnetic resonance imaging (MRI) devices, sensors, and various electronic devices that rely on consistent magnetic performance. Ferrite magnets are durable and reliable, with a high resistance to de-magnetization and corrosion, which makes this ring magnet suitable for long-term applications in both consumer products and industrial devices.