Newton's Cradle Steel Balance Ball Physics Science Pendulum Desk Toys Games Features: 100% brand new and high quality Stainless steel, solid iron ball, nylon sling,Accurate size ensures that it moves for a long time. Pick up a ball and release it freely. The ball on the other side will bounce. It can move repeatedly for a long time. Very suitable for desktop decoration, home decoration It relieves stress, relaxes, and adds a little fun to boring work. WARNING:This toy is not suitable for children under three years old because of small parts. Color: see the pictures Material:plastic,metal Sales Way:Retail, Wholesal,Drop Shipping size: One Size Length: 9.5cm (3.74in) Width: 9cm (3.54in) Height: 7.5cm (2.95in) Quantity: 1PC Note: If you have big quantity (over 50 dollars), please feel free to contact me, I will give you best discount, thanks! Size For Manual Measurement, there may be a 0 to 2 cm error, belongs to the normal phenomenon. And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Newton's Cradle Steel Balance Ball