VGEBY Bike Headset Spacer, 3/5/10/15/20mm Full Set MTB Road Stem Spacer Carbon Fiber Bicycle Mountain Fork Washer Kits

[Good Adjustment Tool]: The bike stem spacer is perfect for adjusting the bottom bracket, handlebar or bike hub, its washers will never collect dust or rot due to oxidation. Adjustable and flexible: Offers different combinations to adjust the height of the handlebar according to your riding style, offers you a great riding experience. [Easy to install]: They are lightweight, easy to install, have a smooth surface and are exquisitely crafted. [3K Carbon Fiber Materials]: The road bike stem headset spacer is made of high quality 3K carbon fiber materials, durable and exquisite workmanship.