Magnet has been widely used in craft gift, luggage, stationery, bags, leather paper packaging products decorative box toy electronic accessories, aviation, aerospace, electronics, electroacoustic, electromechanical, instrument, instrument, antenna, etc, medical technology and other devices that require permanent magnetic field, such as round, square, concave and convex shape, trapezoid, runway, elliptical, etc. Customized according to customer use or requirements various specifications and styles of products