product details Made of strong magnetic material - chromium iron boron, the surface is nickel-plated, Anti-corrosion, anti-stitch, increase the finish. Can hold more than 10 sheets of A4 paper. Material: iron boron Magnet Plating: Nickel Plating Suction Tip: The higher the iron content of the object to be sucked, the greater the suction Magnetization direction: Thickness magnetization (NS poles are on the two large sides) Small refrigerator magnets with round thumbtack heads. Strong neodymium magnets (up to 4 kg). Dimensions: 16x12x12mm Material: Metal, Neodymium Quantity: 4 magnets Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store