Applied Magnets 3" x 2" Grade N45 Neodymium Disc Magnet Super Strong Rare Earth Neodymium Magnets - Strongest Permanent Magnets Available. NdFeB N45 Rare Earth Magnets, stronger than N42, N40, N38, N35 Approximate Pull Force: 645 lbs, Great performance, Wholesale Price 3" diameter x 2" thick, magnetized through thickness, poles on the flat surfaces 1 Strong Neodymium Magnet.