Proven time after time to be a reliable, easily adjustable system that continues to outperform the competition, the 4-Axis stem is a sure fire go to for an entry level stem that has world class performance.Item Specifications: Bar Clamp Diameter (mm): 31.8mm, Color: Black, Defined Color: Black, Material: Alloy, Length: 60mm, Stem Angle (deg): 30deg, S.H.I.S. Stem Clamp Diameter: 28.6,