1、Internal Fixed Structure: Riveting post anti falling structure, safe hex pair lock position, noise reduction, torsion spring pair lock, stable. 2、Good Features: CNC cutting, exquisite workmanship, internal hollow design, lightweight, frosted anode treatment, novel and unique appearance. 3、Adjustable Angle Scale: The adjustment range is minus 60 degrees to plus 60 degrees, choose the angle according to your own cycling preference. 4、Trapezoidal Positioning Teeth: According to the internal stress principle to increase the friction between the slot and the handlebar, not sliding. 5、Hollow Design: The hollow design in the middle, the hollowing plays a light weight role and reduces the riding load, providing good experience. 6、Good Performance: High lift, stable lock, stainless steel screws, high strength torsion resistance, lock more stable, safe riding. Product: Adjustable Height Stem for Mountain Bikes Material: 6061 Aluminum Alloy Color: Black Weight: Approx. 260g / 9.2oz Product Size: Front Fork Diameter: Approx. 28.6mm / 1.13in Handlebar Diameter: Approx. 25.4mm / 1.0in Center Distance Between Two Holes: Approx. 90mm / 3.54in Adjustable Angle: Plus or Minus 60° Suitable for installation: Approx. 25.4mm / 1.0in Diameter Handlebar Features: CNC Cutting, Exquisite Workmanship, Internal Hollow Design, Lightweight, Frosted Anode Treatment, Novel and Unique Appearance The front fork position uses two 5mm hex socket screws, equipped with gaskets, the installation is firmer, the screw length is about 25mm/0.98in. The handlebar position uses four 4mm hex socket screws, equipped with gaskets, the installation is firmer, the screw length is about 25mm/0.98in. 1 x Bicycle Adjustable Stem Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.