Look C-Stem 695 Team Replica - Carbon Aero Stem - 31.8mm - 110mm / 120mmLook C Stem Carbon Aero Stem 31. 8mm 110mm 120mm The High Modulus carbon and hollow structure make the AERO stem exceptionnally stiff and light. The traditional threaded head cap is replaced by a highly resistant stainless steel clamp, which is tighted using two small screws hidden behind the handlebar, inside the stem. This means not even the smallest element gets in the way of airflow, resulting in an aero, streamlined DIRECT DRIVE cockpit.