The SMCN0314 cylinder neodymium magnet is made from high-performance N52 NdFeB, with Nickel coating. The dimension of this item is 1/4″ dia. × 1″ thick, magnetized diametrical, with the tolerance of ±0.004″ × ±0.004″. The weight of this super strong neodymium magnet is 0.0133125 lbs. It can pull up to 11.61 lbs steel. And the surface field is up to 7734 gausses.