Applied Magnets 2.5" x 1/8" Grade N42 Neodymium Disc Magnet Top Quality Rare Earth Neodymium Magnets N42 Grade. Nickel-Copper-Nickel triple layer coated for maximum durability and protection again corrosion. Estimated Pull Force: 30 lbs, Great performance, Wholesale Price. Magnetized through the 1/8" Thickness. Poles are on the 2.5" flat surfaces. ISO Certified, top notch quality and superior performance