SUPER MATERIAL: REALTH Magnet is made from strong neodymium-iron-boron alloy and provides powerful magnetism. All the magnets are magnetized axially and have a maximal operation temperature of 80 degrees Celsius. EXTREME DURABILITY: Nickel+Copper+Nickel triple layer coated a shiny surface and rust-resistant protection as per ASTM B117-03 for the coating layer. All magnets are qualified during production and have quality control. Theoretically the magnets will have permanent longevity without any colliding. VARIOUS SIZES: Various sizes can satisfy your various choices. If you want to buy more sizes of magnets please search for Realth brand. Realth provides professional design and consultation services according to your requirements. APPLICATION: These rare earth magnets can be used for everything including fastening lifting hanging objects Refrigerator Magnets Shower Door Work or Office Scientific Purposes Arts and Crafts or School Classroom. It is interesting especially to search for items like eyebolts screws hooks fasteners and so on in your warehouse garage or yard. A BRAND YOU CAN COUNT ON: Search Realth on Walmart for more sizes shapes functions and other unique magnets. Our products are designed based on actual demands and needs; also we hear voices from our customers every day and provide solutions for their concerns from time to time; your opinion is super important to us!