Description of DIYMAG 40X20Mm Super Strong Neodymium Disc Magnet, Permanent Magnet Disc, The World'S Strongest And Most Powerful Rare Earth Magnets - One Piece
High Quality- Made From Strong Neodymium-Iron-Boron Alloy (Ndfeb) And Have A Stylish Nickel Coating (Ni-Cu-Ni) With An Appealing Silver Surface - All The Magnets Are Magnetized Axially And Have A Maximal Operating Temperature Of 80 Degrees Celsius. Extreme Durability - Nickel-Copper-Nickel Triple Layer Coating For Superior Durability. Multiple Uses - These Magnets Are Ideal For Diy Craft Projects,Science Project Magnets. Use These Rare Earth Magnets For Anything, Including Finding Studs In Your Wall, Fastening, Lifting,Hanging Objects, Various Projects & Presentations, Education, & More. Dimension - Diameter 40Mm X Thickness 20Mm(Approx.1.57"X0.79" ).Tolerances: (+/-0.2Mm) X (+/-0.2Mm).