Made of strong and lightweight zinc alloy, perfectly balanced and mathematically analyzed, it can bring continuous flipping, rolling and falling motions, while creating fascinating fun, fascinating and calm motions, and allows you to extract Some time to get rid of the daily hustle and bustle and regain energy. The secret is to learn the correct movements and techniques, sometimes gentle techniques will win the intensive thrust and provide the greatest sense of flip. Size 1.5" L x 1.5".