Specification:</br>Package included:Stem Extender Adapter Riser</br>Material:Aluminium Alloy</br>Color:Black/Silver</br>Weight:150g/180g</br>Use:all types of Bike; Road Bike, Mountain bike</br>Total Length:150mm</br>Base Diameter(Upper diameter): 1 1/8” (28.6mm)</br>Fork stem diamater: 28.6mm (standard)</br>Steerer tube diameter:22.2mm/25.4mm