Specifications: The magnet with super strong magnetic effect. Widely use in our daily life for different repairing and industrial making. Usage: Acoustic field: the speaker, receiver, microphone, alarm, stage audio, car audio and so on. Electronics: permanent magnetic actuator vacuum circuit breakers, magnetic relays, meter, sound meter, a reed switch, sensors. Electrical field: VCM, CD/DVD-ROM, generators, motors, servo motors, micro-motors,motors, vibration motors. Machinery and equipment: magnetic separation, magnetic crane, magnetic machinery. Health care: MRI scanners, medical equipment, magnetic health products and so on. Wedding corsage badges, etc., can be replaced with a magnet attracts every other clothes pins, so as not to damage the dress. For the overlying metal drawing board for fixing the drawing paper. Item Name: Magnet Material: NdFeB Magnetic Materials Quantity: 5Pcs Shape: Rectangle Grade: N52 Features: Strong Magnetic, Rectangle Shape, Widely Use Size: 40mm x 10mm x 4mm/1.57" x 0.39" x 0.16" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 5 x Magnets