• Set of 50 round neodymium magnets, 10 mm in diameter and 3 mm thick • Triple Ni+Cu+Ni coating to reduce corrosion and achieve a smooth, clean finish • Powerful magnets, much stronger than alnico and ferrite magnets, capable of holding up to 12 sheets of A4 paper on a whiteboard • Multifunctional: perfect for crafts, modeling, experiments, and for attaching objects in the office, kitchen, or workshop • Made with high-quality rare earths through a strict sintering process • Magnets are fragile; it is recommended to avoid impacts or letting them stick together during use • Not suitable for glass magnetic boards