Disc Magnets Large - Neodymium Magnets - SuperMagnetMan
Amazon.co.jp: Magnets, Super Strong Neodymium Magnet, Small Round Disc Magnet, 2/5/10/20/50/100 PCS, 30x10x3 Blocks, NDFEB Neodymium Magnet, 1.2 x 0.4 x 0.1 inches (30 x 10 x 3 mm), N35 Super Strong