Description: 【Sealed Bearing】: This bike headset features sealed deep groove ball bearings with a metal seal, ensuring high speed performance, The design effectively retains lubricants within the bearings, providing good dust and water resistance for smooth and effortless fork integration 【Compatibility】: Designed specifically for 44-44MM folding bikes with a straight fork of 28.6mm diameter, this headset is suitable for frames with a head tube inner diameter of 44mm both at the top and bottom 【Construction】: Made from aluminum alloy, the bike headset offers durability and reliability while maintaining a lightweight profile, making it ideal for enhancing your bike's performance 【Dimensions】: With product dimensions of 4.9cmx4.9cmx6cm/1.93inchx1.93inchx2.36inch, this headset is crafted to ensure fit into your bike front fork, allowing for seamless integration and effortless steering control 【Comprehensive Package】: The package includes a bicycle bearing headset components for installation, ensuring you have everything needed to upgrade or replace your current setup efficiently Specification: Material: Aluminum Alloy Size Chart: 4.9cmx4.9cmx6cm/1.93inchx1.93inchx2.36inch Package Includes: 1 Bike Headset Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.