These carbon fiber headset spacers are easy to install and adjust, allowing you to design your bike's handlebar height with ease. Simply place the spacers between the headset and the stem to achieve the desired height. This simple adjustment can significantly improve your comfort and control, enhancing your overall cycling experience. Features -Color:Black -Material:Carbon Fiber -Size:3.50X3.50X1.00cm/1.38X1.38X0.39in -Lightweight and efficient: made from good carbon fiber, the bike stem spacers significantly reduce weight, enhancing cycling efficiency for mountain and road bike riders focused on speed and lightness -Enhanced comfort: the bike stem spacers improve fork stability, effectively reducing vibrations from rough terrains, resulting in a more comfortable riding experience -Precision fit: precision manufacturing ensures a good fit with the fork headset, enhancing steering accuracy, ideal for complex and varied cycling conditions -Longterm durability: these spacers are wear-resistant and sturdy, maintaining excellent performance over time, reducing the need for frequent maintenance -Easy to install: universally designed to fit various bike models, these spacers are easy to install without the need for extra tools, catering to the upgrade requirements of different mountain and road bikes Package list: 12 x bike stem spacers