GITNU 31.8 Stem 70mm Bike Aluminum Stem Mountain Bike Stem Short for Most Bicycle Road Bike Fixie Gear Cycling Only Fit for Handlebar diameter 31.8mm, front fork stem diameter 28.6mm, Size: 70mm. Please confirm the size you need before you buy it! Lightweight and durable, high strength, Easy installation, four bolt bar clamp holds bar securely in position. Constructed of high-strength machined,aluminum alloy forging, T6 hardening heat treatment safer riding. Suitable for Most Bicycle, Road Bike, mountain bikes,etc. Name: Bike Stem Applicable to: Mountain bike, road bike Colour:Black Material:Aluminum Alloy Package Contents: 1 x Bicycle stem Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.