Feateres: Aluminium alloy, stable for high speed routines. Anodizing surface, resistant to wear and scratch. 10-ball precision bearings, smooth spinning. Suitable for daily practice or competition. Perfect gift for families and friends. Specifications: Material: 6061 aluminum alloy Color: Swamp/Navy Blue/Langmo/Fantasy/Christmas/Burning Cloud/Mystery of the Deep Sea (optional) Diameter:55.56mm / 2.2 in Width: 45.5mm / 1.8 in Gap: 4.48mm / 0.2 in Weight: 65g / 2.3oz Package List: 1 * Yoyo Ball 1 * Glove 5 * String 1 * User Manual