Check the listing for details. Origin8 Fusion 3-Piece Expander Compression Plug Set for Carbon Steerer Tubes,. Condition: New. Listed at 60.18 USD. Upgrade Your Bicycle Steering with the Origin8 Fusion Expander Compression Plug 3-Piece Set Premium Carbon Steerer Tube Compatibility, Lightweight Aluminum Construction, and Enhanced Headset Stability Enhance your bikes handling and steering precision with this high-performance bundle of two Origin8 Fusion Expander Compression Plugs. Designed specifically for 1-1/8 inch carbon steerer tubes, these advanced headset compression plugs deliver a secure fit and optimal force distribution to improve your riding experience. Engineered for durability and superior performance, each 3-piece expander design features lightweight AL6061 aluminum construction, ensuring minimal weight without sacrificing strength. The balanced expansion range of approximately 22-25mm allows for versatile compatibility.