Neodymium sphere magnet, 35 Grade, Diameter: 0.5in, Weight: 0.018 lbs, are made from the most powerful magnetic material in the world, are composed of neodymium, iron, boron and a few transition metals, extremely strong for
Bar Magnet, made from magnetic steel strips. Zinc plated and engraved with N and S to indicate north and south poles. Supplied in pairs with cardboard separator and plated soft iron keepers. For demonstrations, plotting magnetic fields. Size: 6x3/4x1/4 in. (150x19x7mm)