Excellent Quality: The surface of the magnets is triple coated: nickel-copper-nickel. The solid metal surface protects the magnet from breaking, which significantly extends its service life. Perfect Size & Strong Adhesion: Product size: 24 pcs Ø 12x16 mm. Each neodymium magnet can hold up to 20 sheets of A4 paper on a metal surface (only 10 sheets of A4 paper on a whiteboard). Easy to Grip & Portable: Extremely easy-to-grip tapered handles allow magnets to be easily attached or moved. Packaged in a portable storage box to better store your magnets. Never lose a magnet! Wide Applications: Ideal for attaching papers, photos, cards, and notes to various metal surfaces such as refrigerators, whiteboards, aluminum shelves, etc. Also suitable as hooks for hanging keys, etc. [NOT for glass magnetic boards or suitable glass magnetic boards!] Warning: Not suitable for children under 3 years. There is a risk of suffocation due to small parts that can be swallowed. KEEP patients away with pacemakers and defibrillators! Package: 24-pin magnets 1 x storage box