Material Grade：N52。. Magnets are fragile, sintered from neodymium iron boron powder, hard and brittle, fragile is not a quality problem, need to be placed at room temperature storage。. Magnets can only adsorb iron or iron-containing materials, the suction force depends not only on the size of the magnet material, but also with the amount of iron content of the object to be sucked (the magnet suction force requires a higher need to receive a personal test) 。.
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