30Pcs Neodymium Disc Magnets, 20x2 mm Strong Round Magnets for Refrigerator Dry Erase Board Whiteboard Office Fridge, Heavy Duty Rare Earth Magnets for DIY Building Scientific

The neodymium magnets heavy duty is made of Ni+Cu+Ni 3-layer coating, to protect the round magnets surface smoothness and anti-corrosio Multiple Application Small earth magnets will make your work and home life more convenient and simplify your life Flat and Strong 20x2mm/0.79*0.08inch, provide permanent magnetism and are more durable than other magnets.