Features:Suitable for mountain bicycle to rise up the handlebar fork stem Can extend the fork stem by 70mm maximumlyEasy installation， just connect up the original front fork stemMaterial: aluminium alloyBase Diameter: 1 1/8¡± (28.6mm)Fork stem diameter: 28.6mm (standard)Total height: 117mmAdjustable height: 0mm-70mmStem adjuster: 4 spacers: 1 x 10mm & 3 x 5mmColor: blackHow to install:1. Insert STEM-UP onto the fork stem and place height adjusters onto STEM-UP until your preferred height level for your stem.2. Stem and wheel in the same direction and highten clamping bolts of the stem.Package Included:1x bicycle fork stem riser