Description: High QualityThe bicycle crank arm set is made of premium aluminium alloy, high strength, and deformation resistance, durable for long time use. Exquisite WorkmanshipThis bike crankset adopts excellent manufacturing process with fine polish and great paint, which has stable performance and stylish appearance and can add a unique look to your bicycle. Standard PrecisionThe bicycle crankset is perfectly mid motor conversion kits, ensure ultimate chain retention, increase service life, and reduces friction and noise. Easy to InstallThe left right hand crank arms are lightweight and small size, and has standard precision cutting of hole, which ensures perfect fit for bike, easy to install and use. Wide ApplicationThis crank arm set is suitable for road bike, mountain bike, folding bike, fixed gear bicycle, etc. Pay attention to the shape of the inner hole of the crank. Specification: Material: Aluminum Alloy Size: 21cmx8cmx5cm/8.27inchx3.15inchx1.97inch Standard pedal threaded hole specification 9/16, diameter about 1.4cm/0.55inch Package Includes: 1 Pair of Crank Arms Note: Please allow slightly errors due to manual measurement and different monitors.