Cane Creek Ancora Expansion Plug. Features: Premium expansion headset preload for carbon steerer tubes Machined aluminum expansion wedges paired with a knurled sleeve ensure a secure preload Accepts any standard preload bolt and top cap (sold separately) Insertion length: 46mm Contact surface length: 38mm Specifications: Steerer Size: 1-1/8" (28.6mm) Steerer Material: Carbon steerer Color: Gold Weight: 25g