Suitable for 28.6mm bicycle handlebar risers: The size of the bicycle stem is 138 x 30 x 23mm, the height of the washer is 10mm, and the length of the threaded rod is 136mm. It is suitable for most bicycles such as city bikes, road bikes, mountain bikes, and electric bikes. It is recommended to carefully measure the diameter of the bicycle handlebar before purchasing. High-strength aluminum alloy material: The bicycle handlebar riser is made of aluminum alloy, which has high strength and light weight. At the same time, it has a high load capacity and is not susceptible to rust and corrosion, which ensures long-term use of the bicycle handlebar to increase the steering wheel. The bicycle handlebar riser provides you with a premium riding experience. Healthy cycling. Height to choose from: The bicycle handlebar is equipped with 5 washers. You can increase or decrease the number of washers depending on your desired height. The bicycle handlebar can effectively improve your riding position and reduce pressure on your waist and arms to provide you with a more comfortable riding experience. Choose the bicycle handlebar stem and choose health. Double screw structure: The bicycle handlebar provides cyclists with a stable and safe riding experience thanks to the double screw structure that prevents loosening and slipping during riding. The double screws allow easy height adjustment to accommodate different heights and riding positions. Quick installation: The assembly process of the bicycle handlebar lever is quick and easy. With the included hex wrench, you can easily install and remove the bicycle handlebar lever. When assembling, please carefully check whether the screws are tightened to avoid safety problems caused by loose screws.