MagnetMan 12Inch by 18Inch Rare Earth Disc Magnets 14Count 3FREE 17 Magnets

* Dimensions: 1/2" dia. x 1/8" thick * Tolerances: ±0.004" x ±0.004" * Material: NdFeB, Grade N40 * Plating/Coating: Ni-Cu-Ni (Nickel) * Magnetization Direction: Axial (Poles on Flat Ends) * Weight: 0.106 oz. (3.02 g) * Pull Force, Case 1: 6.44 lbs * Pull Force, Case 2: 16.00 lbs * Surface Field: 2952 Gauss * Max Operating Temp: 176ºF (80ºC) * Brmax: 13,200 Gauss * BHmax: 40 MGOe Very strong and solid 1/2" diameter discs. They are a great mid-sized general purpose magnet. Good size for magnetic therapy, science experiments or serious fridge magnets.