Great quality SUPER STRONG MAGNETS – 15 pcs 8mm (5/16″) Spheres / balls / round shaped, nickel plated (Ni-Cu-Ni) Made of N35 Neodymium – rare Earth metal CUSTOM ORDERS ARE WELCOME: Contact us for mix of shapes, sizes and/or different quantities MANY OTHER SIZES / SHAPES / STRENGTHS AVAILABLE – see other listings!! Need a size not listed? Just ask! **These magnets are NOT toys and should NEVER be given to younger children as small magnets pose a choking hazard.**