NIUNIU [Adjustable height] This bicycle handlebar stem, so you can change the spacers to customize the height of the stem according to your riding needs. [Easy installation] Use this bicycle handlebar extender to connect the original front fork rod, and tighten all the bolts with the included hex wrench. [Sturdy material] This front fork rod extender is made of aluminum alloy, which is 20% lighter than ordinary aluminum alloy rod extenders. Strong corrosion resistance, no rust, high toughness and no deformation. quantity of delivery:1 piece (Package contents: Only the above package contents, excluding other products.) size:12*3.5cm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) color:black colors (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)