1The bike stem is made of 6061 aluminum alloy, heat treatment and polishing, super strong and durable. 2Fits 31.8mm / 25.4mm diameter handlebars, according to the matched riser. 3Fits for 28.6mm out diameter front fork tube of bicycles. 4Fold the 10 degrees outside, or folding to the right. 5Height adjustment range is 0-10cm, the maximum length is 430mmFeatures: The bike stem is made of 6061 aluminum alloy, heat treatment and polishing, super strong and durable. Fits 31.8mm / 25.4mm diameter handlebars, according to the matched riser. Fits for 28.6mm out diameter front fork tube of bicycles. Fold the 10 degrees outside, or folding to the right. Height adjustment range is 0-10cm, the maximum length is 430mmSpecification: Item color: black Product material: aluminum alloy Applicable to 25.4mm / 31.8mm diameter bike handlebar, 28.6mm outer diameter front fork tube Dimension (length): approx. 325mm ~ 430mm / 12.8in ~ 16.9in Item weight: approx. 800g Package List: 1 * Bike handlebar stem (other items in picture are not included) Note:The hanging core is not included. The hanging core can be purchased separately according to your needs. For details, please refer to the description of the hanging core. You can use bicycle fork star nut to fix it without the hanging core, which is the same as the fixing method of front fork of mountain bike.