The SMBN0607 block neodymium magnet is made from high-performance N42 NdFeB, with Nickel coating. The dimension of this item is 2″ × 2″ × 1/8″ thick, magnetized through thickness, with the tolerance of ±0.004″ × ±0.004″ × ±0.004″. The weight of this super strong neodymium magnet is 0.135625 lbs. It can pull up to 32.26 lbs steel. And the surface field is up to 738 gauss.