The SMCN0286 cylinder neodymium magnet is made from high-performance N42 NdFeB, with Nickel coating. The dimension of this item is 3/16″ dia. × 2/10″ thick, magnetized through thickness, with a tolerance of ±0.004″ × ±0.004″. The weight of this super strong neodymium magnet is 0.0015 lbs. It can pull up to 1.87 lbs steel. And the surface field is up to 5976 gausses.