Specifications Hign-concerned Chemical:None Type:Bicycle Bottle Holder Weight (g):50 Origin:Mainland China Carbon Fiber Material : Made of high-quality carbon fiber, this bottle holder is lightweight and durable, making it perfect for long rides. Ultralig Design : The ultralig design of this bottle holder ensures that it won't add any unnecessary weight to your bike, making it a great choice for competitive cyclists. Water Bottle Cage MTB Road Bike Bottle Holder : This bottle holder is compatible with both mountain bikes and road bikes, making it a versatile accessory for any cyclist. Matte/Light Finish : The matte/light finish of this bottle holder gives it a sleek and modern look, adding a touch of style to your bike. KOCEVLO Carbon Fiber Bicycle Water Bottle Cage Fire: KOCEVLO Details: Name:Carbon Fiber Bottle Cage Material:Full carbon fiber Max Diameter: About 73mm/2.87in Color:Black/Glossy Weight:About 242g Packing Quantity :1Pair2 Pieces Accessories : 4 screws :Carbon Fiber Water Bottle Cage Is Made Of Full Carbon Fiber Material, The Edge Is Smooth, It Will Not Hurt The Bottle, Strong And Light, Lighter Than Aluminum Alloy, Stronger Than Plastic, Corrosion-Resistant, And Weighs 242g. :Whether On-Road Or Off-Road Over Rough Gravel Terrain, It Ensures Your Water Bottle Won'T Wobble And Fall, Won'T Deform The Cage, And The Firm Grip Keeps The Bottle Securely In Place, And Easy To Remove And Insert. :Screw Hole Distance 2.56 In (6.5cm) ,Water Bottle Holder Diameter 2.83 In (7.2cm) , Suitable For 2.79-2.95 In (7.1-7.5cm) Water Bottles, Bottles That Are Too Large Or Too Small May Not Fit. :Easy installation Comes with 4 screws and uses a 3MM hex wrench to quickly and easily install on your bike and, important note: The water bottle holder only fits the bike frame seat tube and/or tilt down tube..