This is one of the most popular children's toys nowadays! Yoyo ball. But this toy is just more than that! It's even suitable for adults. It's made of high quality aluminum alloy material and feeling good in your hand. Features: It can cultivate the imagination, creativity and rapid reactionability Responsive and Unresponsive modes Transformed: Yoyo with Flat Bearing for Beginners, and with replaced Concave Bearing become Unresponsive Yo-yo for the Advanced player High quality made of high-grade aluminum ,which make it very smooth and comfortable to hold in hand It can be as the first Yoyos gift for Kids, also be an advanced Yo-yos for the Child, Younger, Adults who are passionate in yo yo tricks game For 8 years or up. Nice way to keep the Boys/ Girls off the Internet and off from the sofa in front of the television Specification: Item No.: T9 Body Material: Aluminum+Plastic Weight: 67g Diameter: 51.5mm Width: 39.6mm Gap Width: responsive model: 3.38mm unresponsive model: 4.73mm Style: String Trick (1A, 3A, 5A) Suitable for: Age 8 up Package Information: Package size: 11 * 6.2 * 4.8cm / 4.3 * 2.4 * 1.9in Package weight: 107g / 3.8oz Gift box package Package List: 1 * Yoyo Ball 3 * String 1 * Replace Bearing 1 * Screw