Description: - Qualified Aluminum Alloy road bike headset, lightweight, durable, turning smoothly and low noise. - Fit for threadless steerer or tapered tube fork with OD. 42mm upper cup and OD. 47mm lower cup - Compatible with 1-1/4" (1.25 inch) Tapered Tube - Easy to adjust the bike's steering system after installation - Great replacement for the worn headset that was not steerer smoothly and evenlySpecification: - Material: Aluminum Alloy - Process: CNC - Weight: 92.3gPackage Includes:1 Set Bike HeadsetNote:Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks!