This neodymium magnet is made of top quality neodymium iron boron magnetic material using the state of the art technology. It"s 3/4" in diameter and 1/8" thick with the N and S poles on the flat surfaces and coated with epoxy. The tolerances of all the dimensions are +/-0.01mm with coating. 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. Keep these neodymium magnets away from children under 5 years old. Material: Neodymium magnets, also rare earth magnetic material, N42 Gauss Rating: 13,200 Gauss Holding Power: 9 lbs Magnetized Direction: Poles are on the flat surfaces Applications: holding, crafting