The specialized sworks sl stem with expander plug this s works sl stem is sleek and lightweight and is 3d forged with cnc machined 7075 aluminium perfect for the road specialized sworks sl stem with expander plug features includes expander plug for carbon steerer tubes and titanium hardware 75 90 100 110 120 130mm 6 degree rise 318mm clamp diameter 1 18rdquo steerer tube 40mm clamp height 40mm clamp height