Features: Made of high quality aluminium alloy material, which is beautiful in appearance. Adopted anodized processing, anti-rust, colorfast, non-deformation. High strength and unbreakable, long service life. Easy to install and reliable to use, very practical. Good replacement for your bike, make riding easier and more enjoyable. Specification: Material: Aluminium Alloy Color: Black 28.6*42-52*39.8(30) Surface treatment: Anodizing Specifications: 28.6*42-52*39.8(30) Package Weight: Approx. 110g Application: Standard vertebral fork on 28.6MM and lower 39.8MM (1-1/2”), Standard straight tube front fork on 28.6MM and lower 30MM (1-1/8”) Applicable Front Fork: Standard vertebral fork / standard straight fork Applicable Frame: Head Tube: Upper Inner Diameter: 41.8 (42)mm, Lower Inner Diameter: 52mm Package Included: 1 * Set of Bike Headset