ART IFACT 40 Pieces of 11mm x 5mm x 5mm Neodymium Magnets - N52 Block Magnets - Rare Earth NdfeB Magnets - For DIY, School Project or Commercial Usage Fridge Magnet, Multipurpose Office Magnets, Magnetic Paper Holder Pack of 40  (Silver)

40 Pieces of Neodymium magnet of Rectangular / Block shape N52 Magnets with height of 11 mm, width of 5 mm and thickness/height of 5mm, coated with Nickle (Ni-Cu-Ni). Each magnet's North and South pole are on opposite sides of 11mm X 5mm faces. Rare earth neodymium magnets, also known as NdFeB magnets or Neo Magnets, are made from an alloy of neodymium, iron and boron. They are extremely strong even in small sizes. Neodymium magnets are permanent, and have a high maximum magnetic energy.