Upgrade your bicycle with these high-quality aluminum alloy headset spacers. This pack of 4 spacers is designed to fit 1-1/8" headset sizes, offering a range of thickness options from 5mm to 20mm. Crafted from durable aluminum alloy, these spacers provide reliable support and precise alignment for your bike's front fork. Whether you need to fine-tune the fit or replace worn-out spacers, this set offers versatility and convenience. Lightweight yet sturdy, these spacers enhance your riding experience while maintaining a sleek look. Ensure a smooth and comfortable ride by incorporating these essential components into your bicycle setup.