Description: Features: brand new and high quality Made of high quality alloy, high strength, anti-rust, non-deformation and durable. CNC machining makes the surface smooth and can prevent damage from abrasion. With this adapters, you can change the front hub from 100x15mm to 110x15mm, and the rear hub from 142x12mm to 148x12mm. Comes with necessary accessories, easy to install and convenient to use. Specification: Material: Alloy Color: Black+Silver Optional Style: A front hub, B rear hub Size: As pictures shown.(approx) Style A: 100x15mm to 110x15mm(3.94x0.59in to 4.33x0.59in) Style B: 142x12mm to 148x12mm(5.59x0.47in to 5.83x0.47in) Quantity: 1 set Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Bicycle Hub Adpater 2 x Spacer 6 x Screws(other accessories demo in the picture is not included.)