①. Bicycle Front Fork Stem Extension Handlebar Length Adapter for Mountain Bike (2pcs) ②. This mountain bike handlebar stem is made of aluminum alloy, which is corrosion-resistant, non-deformable and durable. ③. Mountain bike handlebars and forks can freely adjust the washers to meet your height needs. ④. Mountain bike handlebar stem is easy to install, just connect the original front fork stem. ⑤. This mountain bike handlebar stem is suitable for raising the fork of mountain bike stem. ⑥. How to install: 1. Insert the STEM-UP into the fork and place the height adjuster on the STEM-UP until you reach the desired stem height. 2. The direction of the valve stem and the wheel should be the same, and the valve stem tightening screw should be raised. ⑦. Delivery quantity: 2 pcs. ⑧. Package contents: only the above package contents are included, other products are not included. ⑨. Size: (Reminder: The size is measured manually, please allow 1-2 cm measurement error) ⑩. Color: black