Set of 1 magnet 3" OD x 2" ID x 1/2" thick (76.2 mm x 50.8 mm x 12.7 mm) Material: Neodymium (NdFeB) Grade: N48 Coating: Nickel (Ni) Magnetization: Axial Pull Force: 48.94 pounds SKU# M3212R OD = Outer Diameter ID = Inner Diameter