Features:This bottle bracket adapter is made of qualified aluminum alloy and plastic, adopts CNC texture, solid, firm and durable to use, ensures a long service life. This adapter is used to fix your bottle bracket on the handlebar tube or the stem tube, suitable tube diameter is about 30.9-33.9mm. Lightweight and easy to carry, easy to install and convenient to use. Great accessory for mountain and road bike. Good quality with reasonable price, you will like it. Specifications:Condition: 100% Brand New and High QualityMaterial: Aluminum Alloy & PlasticTexture: CNCColor: BlackSize: Approx. 7.6 x 6.5 x 1.5cm / 2.9 x 2.5 x 0.6inchSuitable Tube Diameter: Approx. 30.9-33.9mm / 1.2-1.3inchWeight: Approx. 42g Package IncludingPacking List:1 x Water Bottle Bracket Adapter2 x Gommures