ZS44 EC44 CNC 1 1/8" to 1/2" Straight Tube Frame to Tapered Tube Fork 1.5 Adapter Made of high-quality aluminum alloy, lightweight and durable Full CNC machining for precise fit and smooth operation Compatible with sealed cartridge bearings and universal headset cap for mountain and road bicycles Suitable for MTB and road bike applications Material: Aluminum Alloy Color: Black Package Weight: approximately 126g Diameter: approximately 44mm / 1.73in Note: Please allow 1-3mm error due to manual measurement. Ensure you are comfortable with this before purchasing. Due to differences in monitor displays, the image may not reflect the actual color of the item. Package Includes: 1 Piece Cone Tube Headset