FHSVUD Super Strong Neodymium Magnets with Screw, Rare Earth Metal Magnets with Hole in The Center for Mounting Industrial Warehouse, (20x5mm Hole 5mm, Pack of 4): Amazon.com: Industrial & Scientific
130 x 8 x 5mm thick N42 Neodymium Magnet - 23.7kg Pull
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100 Neodymium Magnets Round Disc N35 Super Strong Rare Earth 5mm X 1mm Lot USA - Florida Technical College