Description: Made of aluminium alloy material,lightweight and durable. Equip with 4 gaskets,3 x 10mm and 1 x 5mm, can increase the height up to 70mm. Can freely adjust the gasket to fit your own height. Easy installation, just connect up the original front fork stem. Suitable for mountain bicycle to rise up the handlebar fork stem. Specification: Material: Aluminium alloy Base Diameter: 1-1/8'' (28.6mm) Fork Stem Diameter: 28.6mm (standard) Length: 122mm / 4.8inch Color: Silver, Black, Gold, Red, Blue (optional) Package Includes: 1 Piece Bicycle Fork Stem Extender Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks!