Magcraft NSN0610 1/4-Inch by 1/10-Inch Rare Earth Block Magnets, 50-Count

Neodymium iron boron (NdFeB) rare earth magnets
Grade - N40
Dimensional tolerance - +/-0.005 Inch
Plating - nickel-copper-nickel
Maximum working temperature - 176-Degree Fahrenheit (80-Degree Celsius) Rare earth magnets are the strongest type of permanent magnet currently made. They are amazingly powerful for their size and have innumerable uses. These block magnets are 0.25 inch (6.4mm) long, 0.25 inch (6.4mm) wide, and 0.1 inch (2.5mm) thick. They are composed of grade 40 neodymium iron boron magnetic material and are plated in nickel-copper-nickel for a shiny corrosion resistant More »