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. 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 graphics. Item Specifications: Stem Angle (deg): +6, Stem Angle (deg): -6, S.H.I.S. Stem Clamp Diameter: 28.6, Defined Color: Black, Stack Height: 41, Weight: 150, Color: Blast Black, Material: Aluminum, Length: 80, Bar Clamp Diameter (mm): 31.8,