Condition:100% brand new and high qualityMaterial: Nickel Diameter: 4mmColor: SilverPackage included: 125 pcs maganetic ball with box-This is an amazing intellectual toy，can be used as an educational tool for children.-They are magnetic ball bearings that you can make in different shapes or objects.-You can use it to design / build anything which you can think with these magnetic spheres， like 2D or 3D objects and superstructures.Note: The small parts not suitable for children under 8 years old.