Features: Make from aluminum Alloys materials, light weight, strong and enduring. Double clamps for strong and secure hold. Used to increase frame length and make your cycling position more comfortable. Suitable for 25.4mm calibers handlebar. Great accessories for Fold, mountain Bike , road, Bike cycling. Specifications: Materials: Aluminum Alloys Journey: 20-25mm/0.79-0.98inch Installation diameter of handlebar: 25.4mm/1in Installation length: 45mm/1.77inch Head tube installation diameter: 25.4mm/1in Head tube installation width: 43-45mm/1.69-1.77inch Precautions: it is recommended that the assembly angles be 40°±5 Package Includes: 1pc Mountain Bike Stem note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.