Amazon.co.jp: OMO Magnetics [World Strongest Magnet] Strong Magnetic Magnets N50 Neodymium Neodymium Cylinder Type Round Round 22x10 mm Diameter 22 mm Thickness 10 mm Nickel Plated with Exclusive Case : Office Products
Ring Magnets - Neodymium Magnets - SuperMagnetMan
5mm x 3mm Neodymium Magnets N50 0.6Kg Pull (50 pack)