Lightweight water bottle holder made of carbon fiber, with reliable solidity, perfect for cycling. _ Features:_ Carbon water bottle cage, extremely lightweight and solid. Fit water bottle diameter: 72-74mm/2.8-2.9in. Easy to install, simply mount on the front bar, no need help of any tools._ Suitable for both mountain bike and road bike. _ Specifications:_ Quantity: 1Pcs / 2Pcs (Optional) Water Bottle Diameter: 72-74mm/2.8-2.9in Material: Carbon Fiber Bottle Holder Weight: 26g / 0.9oz(for 1 pcs) Package Weight:_110g / 3.9oz Package Size: 17.5 * 11.5 * 9.5cm / 6.8 * 4.5 * 3.7in _ Package List: 2* Bicycle Water Bottle Holder 4* Screws