Set of 30 magnets 1/2" long x 1/4" wide x 1/8" thick (12.7 mm x 6.4 mm x 3.2 mm) Material: Neodymium (NdFeB) Grade: N48 Coating: Nickel (Ni) Magnetization: Through Thickness Pull Force: 4.9 pounds. SKU# M12x14BL