Description: MaterialThe bicycle crank arm is made of quality aluminium alloy material, high strength, and deformation resistance, sturdy for long term use.Fine WorkmanshipThis bike crank arms adopt great manufacturing process with fine polish and great paint, which has stable performance and stylish appearance and can add a unique look to your bicycle.FunctionThe bicycle crank arm is great part, ensures ultimate chain retention, increases service life, and reduces friction and noise.Easy to InstallThe bike crank arms are lightweight and compact size, which ensures a great fit for the bike, and is easy to install and use.Wide ApplicationThis crank arm set is suitable for exercise, mountain, and folding bikes. Specification: Material: Aluminum AlloySpeed: 7s-12sShaft Diameter: 24mm Size Chart: Length: 165mm/6.50inch Package Includes: 1 Pair Bike Crank Arm Note: Please allow slightly errors due to manual measurement and different monitors.