Item Name: Stem Road Bike Handlebar Riser Adjustable Angle Bicycle Stem Extender MTB. Helps relieve the pressure on your back and waist by adjusting the handlebar of your bike.Color: BlackMaterial: Aluminum AlloyMade of Alluminium Alloy material, more durable to use.Bike handlebar riser is used for adjust your bike's height and angle in order to suitable for your riding.Mountain Road Bike Handlebar Riser Adjustable Angle Bicycle Stem Extender100% brand new with high qualitySize:25.4x90mm,25.4x110mm,31.8x90mm,31.8x110mmHandlebar Hole Diameter: Approx. 31.8mm / 25.4mmSteerer Tube Diameter: Approx. 28.6mmCenter Length (Bar bore clamp center to steerer clamp center): Approx. 90/110mmStem Angle:+ / - 60 degree adjustablePackage Included:1 x Bicycle Stem Handlebar RiserNote:Please allow minor error due to manual measurement.The colors may be a little difference for the different monitor display. *Please make