Description: This bike front tube extender is designed for quickly increasing the height of your handlebar. The height can be extended from 3mm to 50mm,which can meet your different needs. You can use it on the tube within 24.6mm to 25.4mm inner diameter,it features simple and fast installation,no need to use any special tools. Made of strong and tough aluminum alloy,it is solid and has good toughness,is wear resistant and not easy to be corroded. You can use it to adjust the height of your handlebar to make it easier to hold traction on the steep hill. Specification: Material: Aluminum alloy. Color: Black and silver. Size: Show as picture. Height range: 3mm-50mm. Suitable inner diameter: 24.6mm-25.4mm. Note: There might be a bit color distortions due to different computer resolutions. There might be a slight errors due to different hand measurement. Package Include:1* Bike stem extender