full carbon fiber bicycle stem,carbon bike stem GST01 carbon bicycle stem supply 1 year warrant sample accept Products Specification: full carbon fiber bicycle stem,carbon bike stem GST01 Type:carbon stemModel:GST01Material:Full Carbonweave ... .8mm,steer clamp: 28.6mmsize:80mm,90mm,100mmwe also supply carbon frame,carbon fork,carbon saddle,carbon handlebar and other bicycle parts.