Fit for: Bike,bicycle. Material:Aluminum Size 1:Hole distance of 48mm, an inner diameter of 34mm(approx) Size 2:Hole distance of 44mm, an inner diameter of 34mm(approx) Process: CNC, T6 treatment Color:Silver Quantity: 1 pc Package includes:Threaded hubs disk x 1 100% brand new and high quality Exquisite workmanship, feeling fine, easy to use. Unique thread design, effectively and directly to make bicycle braking. Note: No retail package. Please allow 1-3mm 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!