The Zipp Service Course stem delivers all you look for in a high-performance stem - strength, stiffness, reliability, a precise fit and great visual look. The SC stem offers a new faceplate and body design for greater stiffness and easier installation at a price that meets any rider budget.Features-Forged AL-6061-Machined and relieved faceplate-Features stainless steel hardware with TORX heads on all bolts for precision torque readings and ease of adjustment-Bead-blast Black with laser-etched graphicsItem Specifications-Color:Silver-Bar Clamp Diameter (mm):31.8 mm-Length:80 mm-Material:Alloy-Stem Angle (deg):-6 deg-Stem Angle (deg):+6 deg-Defined Color:Silver-S.H.I.S. Stem Clamp Diameter:28.6