Welcome to our store! The 25cm bicycle extension is suitable for installing bicycle handles with a diameter of 18-34mm. Durable aluminum alloy: Compared to carbon fiber rods, aluminum is very durable. Ultra light, portable, and durable materials. Easy to install and disassemble: Hollow hexagonal screws and hexagonal wrenches are used for easy installation and disassembly. Application Suitable for your bicycle handle, adding extra storage space for your bicycle lights, GPS, or phone, etc. Due to manual measurement, the product you received may have some dimensional errors Due to different monitors, the product you received may differ slightly from the picture Actual delivery quantity: 1 piece 100% Satisfaction - Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactory after-sales service.