1,Made of premium aluminum alloy material,anti-deformation,anti-collision and durable to use. 2,Designed to train fine motor skills and eye-hand coordination. It also can cultivate the imagination,creativity and rapid reactionability. 3,Dual functions for professionals,beginners and 8 yearsand kids. 4,Gold 10-ball bearing provides 4.4mm middle width,fits for unresponsive use.Suitable for professionals and advanced players playing tricks. 5,Silver 8-ball bearing provides 3mm middle width,fits for responsive use.Suitable for beginners and 8 yearsand kids. 6,3-finger glove helps to get minimal friction for high speed string tricks.One size fits most hand size. 7,Come with 5pcs strings,easy to replace and use. Perfect choice for professionals,advanced players,beginners,kids,etc. Features: Made of premium aluminum alloy material,anti-deformation,anti-collision and durable to use. Designed to train fine motor skills and eye-hand coordination,It also can cultivate the imagination,creativity and rapid reactionability Dual functions for professionals,beginners and 8 yearsand kids. Gold 10-ball bearing provides 4.4mm gap width,fits for unresponsive use.Suitable for professionals and advanced players playing tricks. Silver 8-ball bearing provides 3mm gap width,fits for responsive use.Suitable for beginners and 8 yearsand kids. 3-finger glove help to get minimal friction for high speed string tricks.One size fits most hand size. Come with 5pcs strings,easy to replace and use. Specification: Color: Brown / Black / Red/ Black and Blue/ Black and Pink (optional) Material: Aluminum alloy For age: 8 years up Diameter: 55 mm / 2.2 in Width: 41 mm / 1.6 in Gap width: 4.4mm / 3mm Ball weight: approx. 66.7 g / 2.4 oz (not includes strings and other accessories) String length: approx. 1050 mm / 41.3 in (for each) Package size: 103 x 60 x 47 mm / 4.1 x 2.4 x 1.9 in Package weight: approx. 97.6 g / 3.4 oz Package List: 1 x Yo Yo Ball 1 x 8-ball Bearing 1 x Screw (for silver 8-ball bearing) 5 x Strings(color by random) 1 x Instruction 1 x 3-finger Glove 1 x Yo Yo Ball 1 x 8-ball Bearing 1 x Screw (for silver 8-ball bearing) 5 x Strings(color by random) 1 x Instruction 1 x 3-finger Glove Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.