3T Carbon Fiber Top Cap Spring Headset Stem , 1-1/8inch 3T Carbon Fiber Top Cap Spring Headset Stem , 1-1/8inch Material: Top cap :full carbon fiber; Body: 2014AL Headset Size: 1-1/8", Steer Tube Size: 1-1/8" Full Carbon Fiber Top Cap Height: 4cm, Weight: 50g