tymagnetics
https://www.tymagnetics.com/products/alnico-disc-and-rod-magnets.html
AlNiCo disc magnets are a type of permanent magnet made from an alloy of aluminum, nickel, and cobalt, along with other trace elements. These magnets are known for their strong magnetic properties, high coercivity, and excellent resistance to demagnetization. They are commonly used in applications such as electric motors, sensors, loudspeakers, and various other industrial and scientific applications.
AlNiCo 5 rod magnets have a disc or cylindrical shape with a flat circular face and are typically magnetized through the thickness or diameter. They come in a range of sizes and magnetic strengths, from small ones that can fit on the tip of a finger to larger ones that can hold several kilograms of weight.