Description: Made of aluminium alloy material, high strength, lightweight and durable. To change your handlebar/ stem size easily with this bushing without changing stem Full CNC precision machining with smooth edges which won't hurt your finger Convert 25.4 mm to 31.8mm or 31.8 mm to 35mm Ultra-light won't add any burden to your bike Specification: Material: aluminium alloy Color: Red Length: 41mm/1.6 inch Height: 16.6mm/0.65 inch Package Includes: 1 Pair Bike Stem Adapter Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks!