The Ancora Expansion Plug is designed for use with carbon steerer tubes. Machined Aluminum expansion wedges paired with a knurled sleeve ensure a secure fit with the correct preload amount.Accepts any standard preload bolt and top cap (sold separately)Compatible with steerer tube inner diameter of 22.75 mm to 24.6 mmInsertion length: 46mmContact surface length: 38mmItem SpecificationsColorGold Cane Creek Ancora Expansion Plug Compression Plug UPC: 840226091341