This product is made by steel, which is durable and rust *resistant, it is suitable for longtime use,This product is 12G electric bicycle spokes with nipples, and each spoke is matched with a suitable head cover, which is easy to install.Made by high *strength carbon steel material, durable and rust *proof.The length of this product is 60mm *305mm.It is suitable forbicycle wheels of many different sizes, refreshing your bike and making it look like new.Item Name: Bike SpokesMaterial:SteelSize Details:Diameter: 2.5mm/0.10 (Approx.)Length: 60mm * 305mm/2.36 * 12.01 (Approx.)Notes:Due to the light and screen setting difference, the items color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:36 X Bike SpokesProducts from NIUNIU's store