Newton's Cradle 1.Newton Cradle Diameter:22.23mm 2.Material:Metal Frame,Iron Balls,Wood Base 3.Size:19cm*16cm ... Material: chrome iron on the sturdy frame, pedestal is wood metal or plastic frame , Five iron balls3) We are ... specialized in producing Newton's cradle . It is a good education toy for kids ... impact second ball,the lasted ball will waggle. Wood Base Newton's Cradle