●EASIEST WAY TO PERSONALIZE YOUR BIKE: While cycling with friends, just look down to see your unique bicycle top cap. Enjoy more fun in the most economical way. ●BLACK RUST-RESISTANT BOLT: Come with a titanium M6-1.0x35mm bolt. 40% lighter than steel, but with superior corrosion resistance. ●MATTE PERMANENT PATTERN: No need for excessive description, black never goes out of style. Perfect replacement for old headset top caps. ●LIGHTWEIGHT BICYCLE ACCESSORIES: 6061 aluminum offers the required strength and is lightweight, with a weight controlled within 10g. ●UNIVERSAL COMPATIBILITY: Compatible with any bicycle with a stem diameter of 1-1/8 inch, especially suitable for mountain bikes.