Speedline Compression Plugs are top assemblies for carbon steerers. Replaces the traditional top cap assembly.
This is the 1 1/8" Version for Cro-mo Forks and Aluminum Forks that typically require a star nut. This is a less damaging way of installing your headset.
NEVER USE A STARNUT ON A CARBON STEERTUBE! DOING SO WILL VOID YOUR WARRANTY!