Specifications: Material: Aluminum Alloy Model: 3/4 , 5/6 , 7/8 (optional) Color: Black / Silver / Green / Blue (optional) Gear Ratio: 1:1 Bearing: 2and1 BB Package Size: 11 - 11 - 8.5 cm / 4.3 - 4.3 - 3.3 in Package Weight: 149-245 g / 5.3-8.6 oz Package List: 1