The SMCN0371 cylinder neodymium magnet is made from high-performance N52 NdFeB, with Nickel coating. The dimension of this item is 1″ dia. × 1″ thick, magnetized Through thickness, with the tolerance of ±0.004″ × ±0.004″. The weight of this super strong neodymium magnet is 0.213125 lbs. It can pull up to 75.52 lbs steel. And the surface field is up to 6619 gausses.