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The Neodymium (NdFeB) rare earth magnet is the strongest permanent magnet today and boasts an extremely high magnetic force and energy. They are used in devices and instruments where a strong magnetic field is required, such as in avionics, spacecraft, electronic instruments and test equipment, medical instruments, microphones, DC motors, loudspeaker drivers, magnetic therapy products (you know the product..."Guaranteed to take 2~6 strokes off your game!")...the list goes on. They're ideal for experimentation, science fair projects, alternative medical purposes, hanging up your kid's pictures on the fridge, but above all that, they're just plain fun to play with. "Take two...they're small!"
Specifications:• Dimensions: 1/2" OD x (1/8" ID x 1/4" ID) x 1/8" thick • Magnetization Direction: Axial (Poles on Flat Ends) • Pull Force: 13.00 lbs. • Surface Field: 3245 Gauss
Countersunk ring with a 1/8" hole and 90° taper. This means that the large hole is 1/4" in diameter. The south pole is on the side of the magnet with the large hole. These countersunk rings can be used for a wide range of applications including door closures and tool hangers.
Caution!Because of the high strength of Neodymium magnets, and to prevent injury to people or equipment, care must be taken when handling, e.g. around other magnets, metal objects, electronic equipment, computer disks, watches, bank cards, etc.