Zipp s SL Speed stem represents the essence of carbon componentry. It s stiff, secure and light weight with a sleek design that compliments any bike.Unidirectional carbonIncludes stiff aluminum faceplate and titanium hardware Torx T25 heads for precise torque readings and ease of adjustmentBlack matte carbon finish with white Zipp logosItem SpecificationsBar Clamp Diameter (mm)31.8ColorMatte BlackDefined ColorBlackLength70MaterialCarbonS.H.I.S. Stem Clamp Diameter28.6Stack Height41Stem Angle (deg)+6Stem Angle (deg)-6Weight123