Alnico Block Magnets

https://www.tymagnetics.com/products/alnico-block-magnets.html

These custom magnets china produced by custom magnet manufacturer Tengye have a high coercivity, which means they require a significant amount of force to demagnetize them, making them ideal for use in applications where a strong and stable magnetic field is required. They are also resistant to high temperatures and can maintain their magnetic strength even in extreme heat.