COICER Handlebar Riser Bike, Stem 28.6mm/21 × 2.86cm, Bicycle Handlebar Extension for Riding Health, Handlebar Extension Aluminum for MTB, Road Bike, City Bikes

["\"Suitable for 1-1/8\" (28.6mm) Bicycle Handlebar Extension: The size of the bike stem riser spacer height is 5mm, 2*10mm & 3*20mm, and the threaded rod length is 210mm. 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 handlebar extender for bike is made of aluminum alloy, which has high strength and light weight. It is stronger and does not deform like other materials. It also has excellent corrosion resistance, so it does not rust even when wet in the rain. This gives it a longer lifespan and can be used for a long time, providing you with a high-quality riding experience!\"", "\"Choose the desired height and ride healthy: The MTB stem extender is equipped with 6 spacers. You can increase or decrease the number of spacers according to the desired height. It can improve your riding posture, reduce waist, neck, and arm pain, inability of the back to straighten up, and other health problems caused by incorrect riding posture, and provide you with a more comfortable riding experience.\"", "\"Double screw fixed, not easy to loosen: The bicycle handlebar riser is reinforced with a double screw structure to prevent loosening and slipping during riding, providing the rider with a stable and safe riding experience.\"", "\"Simple, quick, and convenient installation: The installation process of the bike handlebar extender is fast and easy. With the included hex key, you can easily install and remove the bike handlebar extender. Please carefully check during installation if the screws are tightened to avoid safety issues due to loose screws.\""]