FCFB sliver black road bike stem mountain bike stem 80/90/100/110mm super light 122g 100mm This is a world-class OEM factory Shun Feng Technology Co., Ltd. Foundry size 80/90/100/110nn angle 6 fork diameter 28.6 mm , handlebar diameter 31.8mm weight 100mm 122g China Patent ZL 2013 20480319X