Classic Newton's Cradle Steel Balance Balls Physics Science Accessory Home Office Desk Decoration Toys, Large Size HIGH QUALITY -- Manufactured by Westonetek, stylish and innovative design. Solid wood foundation & stainless steel swinging balls. GREAT GIFT IDEA -- Something gets everyone's affection and makes a lively office decoration or executive gift. VERSATILE -- (1) An exquisite decoration that can be placed in house,school or office (2) Educational purpose (3) Psychological purpose MEANINGFUL -- Excellent educational & science gadget, own your very own piece of scientific history and explore significant values of physics. LARGE SIZE: 180x120x180mm, Material: Wood Base + Metal Holder