DOTSOG Newtons Cradle Desk Table Decor Metal Pendulum Ball Newton Ball Physics Science Pendulum Steel Balance Ball for Office Physics Teacher Toys

Strong line– Tempily Our newton cradle use high quality nylon line which is strong enough to not be broken easily Swing Time–The balance balls continue in perpetual motion for only 15-20 seconds due to the resistance of the air and friction, but it wont influence the effect of playing although it can not reach the seamless convergence among balls in the vacuum. Physics Education Toy–It is a nice gift, we can send it to our friends, children, family. Application–You can put it on your office desk or your home desk or on your shelf. It will be cool desk toy. Satisfaction Guranteed–24 hours after-sales service, if your products have any problems, feel free to contact us, we will immediately solve, and guarantee 100% satisfaction