For cross country and all-mountain riding, Dimension Trail Stems provide a broad array of sizing options--lengths from 35 to 120mm--rigorously tested to ISO 4210 Mountain standards. Constructed with AL-6061-T6 aluminum. Shot-peened finish. Dimension stems are not intended for use with carbon handlebars or carbon steerer tubes. Material: Aluminum. S.H.I.S. Stem Clamp Diameter: 28.6. Length: 70. Bar Clamp Diameter (mm): 31.8. Stack Height: 37. Stem Angle (deg): +6 , -6.