[SIZE & COMPATIBILITY: Universal fit and easy to install EVOSID MTB STEM Handlebar diameter: Length（40MM） Height（40MM） Front fork diameter（28.6MM） Handlebar Diameter（31.6MM） Screw（M5） Weight: 139g Suitable: For downhill and off-road. BIke short stem is more conducive to the control of the bike so that the bike steering is more flexible and the short stem with the long handlebar will safer and more stable at high speed. DESIGN: Aviation grade high strength aluminum alloy appearance electroplating oxidation treatment anti-rust anti-oxidation bright color and long-term non-fading. Ultra-lightweight hollow design strong shape Beautiful details large area CNC hollowed out in the center reduces weight without losing strength. DIVERSITY: 5 different colors to choose: Black Black Blue Red Titanium color. You could choose the most suitable one for your bike. Service and after-sales: Our company is committed to designing and developing more bike accessory. We provide 90 days warranty. If you are not satisfied with our product or you have any questions, please feel free to contact us. We will provide you with satisfactory solutions]