The product has the ability to be easy to install and use, and hold bar securely due to its lightweight structure.The product has the ability to help to up or down the height of handlebar for a more comfortable ride.Made of high quality aluminium alloy, it is durable and wear resistant.There are 2 specifications for you to choose from.It is used to adjust the height and angle of the handlebar.Item Name: Bicycle StemMaterial: Aluminum AlloyInstallation Height: 40mmFork Diameter: 28.6mmHandlebar Diameter: 31.8mmSize Details: 90mm Size: 15.2cm x 4cm x 4cm/5.98" x 1.57" x 1.57" (Approx.)110mm Size: 17.7cm x 4cm x 4cm/6.97" x 1.57" x 1.57" (Approx.)Notes:Before purchasing this stem raiser, please confirm whether the length of the transmission cable and the brake cable are long enough.Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Installation Height: 40mmThe 90mm specification removes the front fork height, and the maximum angle can be increased by 112mm.The 110mm specification removes the front fork height, and the maximum angle can be increased by 137mm.Package Includes:1 x Bicycle Stem