This listing includes 100 pieces of neodymium magnets which are 1/2 inch (12.7mm) in diameter and 1/16" thick(1.59mm). They are composed of grade 45 NdFeB material and plated in nickel-copper-nickel for a shiny corrosion resistant finish. They are axially magnetized, so the N and S poles are on the flat surfaces. The tolerances of all the dimensions are +/-0.01mm = +/-0.0004". Neodymium magnets are the strongest permanent magnets currently made. They are amazingly powerful for their size and have innumerable uses. CMS makes the top notch neodymium magnets with the state of the art technology. CMS neodymium magnets are superior to other brand in terms of higher strength, better coating, tighter tolerance and better longevity. All the CMS neodymium magnets are made under ISO 9002 quality systems. Note: 1. All magnets may chip or shatter. But if used properly, these magnets can serve you for a lifetime. 2. Keep these neodymium magnets away from pacemakers and children under 5 years old.
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