About this item ?HIGH QUALITY?Adopting aluminium alloy material, this product is anti?rust, and for long time use. CNC fine machining ensures accurate cutting and forging, fits your perfectly. ?SIZE DETAIL?Product Height: Approx. 15mm/0.6in. Outside Diameter : approx 46mm; Inside Diameter: approx 1 1/8″ (29mm). ?SUITABLE FOR?Can be applied for most ‘ modification. Fit for 28.6mm/1.1in front fork. Suitable for mountain and road bike. ?EASY TO USE?Simple design and easy to install and disassemble, convenient to use. ?GUARANTEE?If you are not satisfied with our product you received, you can send emails to us at any time. We will reply you instantly and help you solve your problem.