Specifications: Featuring round disc shape, hard texture, with stable performance. Application is extremely wide. 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. Healthcare: MRI scanners, medical equipment, magnetic health products and so on. Type: Magnets Material: NdFeB Quantity: 10Pcs Grade: N30 Plating: Ni-Cu-Ni (Nickel) Features: Round Disc, Super Strong Magnetism, Multipurpose Size: 20mm x 2mm/0.79" x 0.08" (Approx.) Notes: Please place it to where children cant find, in case of accidental swallow. 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: 10 x Magnets Featuring round disc shape, hard texture, with stable performance. Application is extremely wide.