FSA SL-K Carbon 18mm Riser MTB Bar - 31.8, 660mm FSA (Full Speed Ahead) SL-K Carbon Mountain Handlebars. Carbon Structural Integration (CSI) permanently bonds Unidirectional Carbon Skin to AL-6066-T6 bar Item SpecificationsColorBlackWeight214gBar Rise18mmBar Width660mmBar Clamp Diameter31.8mmMaterialCarbonBend9degDefined ColorBlack