Spherical: butterfly Material: aluminum alloy 6061 + environmentally ABS Weight: about 68g Diameter: about 55.9mm/2.20in Width: about 42.3mm/1.67in Shaft width: about 4.59mm/0.18in Bearing: high-precision 10-ball bearing Surface treatment: bright surface Screw specification: about 4*16mm/0.16*0.63in Applicable moves: (1A, 3A,5A) Recommend age:above 3 years old Packing List:1Pc Yoyo Professional unresponse yo-yo: is most suitable for advanced players to do 1A/3A/5A skills. Increase yo-yos skills as you progress-long sleep and spin, suitable for intermediate, expert, advanced players, adults, friends, family. Excellent balance: Aluminum high-speed professional unresponsive Yoyos design. Exquisitely crafted, the weight of each circle is uniform, and you can feel the beauty of symmetry. More weight was added to the edges to improve performance. It is recommended to children for daily practice or competition. Professional Yo-Yo a slow-response offstring yo-yos, which is widely used. It not only brings an perfect yo-yo experience for children, but is also suitable for advanced players to practice. You can learn more yo-yo skills ( 1A, 3A, 5A) and practice more through online videos. It is recommended for daily practice or competition use. This elegant of aluminum trick yo-yo is the perfect gift for children, family and friends. Beautiful reverse color-anodized reverse splash pattern to create a unique style. Each Yoyo hand splash pattern is unique. High-quality ball bearings ensure the smooth and fast running of the yoyo, allowing you to play more tricks.