FCFB Aluminum carbon package stem road MTB bike cycling stem 80/90/100/110mm super lihgt 122g size 80/90/100/110nn angle 6 fork diameter 28.6 mm , handlebar diameter 31.8mm weight 100mm 122g This is a world-class OEM factory Shun Feng Technology Co., Ltd. Foundry Locking fork manner, together with another portion of the rod body, a more stable two screws,