This Yoyo ball is suitable for children of all ages to perform like professional players and improve their skills. It is mainly made from high-quality Metal material with high precision of the ball process, which is a great toy for kids. Features: Professional Yoyo Y01 is made of alloy 6061, sandblasting finish yoyo surface touch feels good and looks cool when you spin yoyo and the matte finish is steady to lay a finger on while spinning. Upgrade Yoyo: Durable 10ballstainlessKKbearingwon't rust and keeps yoyo high-speed stable spinning. Style string trick (1A, 3A, 5A). Yoyo weight: 68g; diameter: 55mm; width: 44mm; gap width: 5mm. Professional design: it is a professional Design, with high-speed stable spin and perfect symmetry to make it turning a longer time. Super smooth sandblasting finish surface never fade and not easy to scratch. It can cultivate the imagination, creativity and it is a great gift for your kids to strengthen coordination, flexibility, hand, and wrist strength. Specifications: Product name: YO-YO Body Shape: Butterfly Diameter: 55mm Width: 44mm Gap Width: 5mm Bearing Structure:10 ball stainless KK bearing Body Material: Alloy 6061 Style: String Trick(1A,3A,5A) Response: Yellow Silicon Pad String Length: 43.31in/110cm Weight: 68g Package List: 1*YOYO Y01 5*Yoyo Strings (random colors) 1*Glove 1*Bag