Check the listing for details. FSA System Integration Headset Expander Top Cap 22.5 ID Threadless Headset Fork. Color: Black, Condition: Used. Listed at 23.74 USD. FSA System Integration Headset Expander Top Cap 22.5 ID Threadless Headset Fork System Integration headset expander plug with black aluminum top cap Used Cannondale System Integration headset expander plug with black aluminum top cap for threadless steerers with 22.5 ID. Top cap and alloy sleeve have cosmetic scratches, small edge nicks, and light finish wear from prior installation and use; printed graphics show minor rubbing but remain fully legible. Expansion hardware and internal threads are clean and intact, and the wedge mechanism operates smoothly when the bolt is turned. Listing includes the single System Integration expander and cap only; calipers, scale, and any other background items visible in the photos are not included.