1、NEODYMIUM MATERIAL: The compact, light magnet is constructed of premium neodymium iron boron and stainless steel. 2、CORROSION RESISTANT: Three layers of nickel, copper, and nickel coatings offer a smoothly surface while reducing corrosion. 3、LONG LIFE SPAN: Because the magnet is protected by the steel cup's interior, which considerably increases the magnet's service life. 4、WIDE APPLICATION: The magnet can be used for interesting decorating in the house, office, classroom, and school as well as for science classes for adults and children. 5、5PCS: The package contains 5pcs countersunk hole pot magnets that are excellent for replacement and long term use. 5 x Countersunk Hole Magnet Item Type: Countersunk Hole MagnetMaterial: Neodymium Iron Boron, Stainless SteelColor: SilverSurface Electroplating: Nickel platingWorking Temperature: 80 ℃Application: Suitable for family, office, classroom, school, science, adult, children's science and interesting decoration. 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-Dadangjia