Description: [Premium Material]: The crank arm is made of premium aluminium alloy, high strength, and deformation resistance, durable for long time use. [Standard Precision]: Ensure ultimate chain retention, increase service life, and reduces friction and noise. There is no overlap between crank arm and chainring bolt. [Exquisite Workmanship]: The bike crank arm 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. [Easy to Install]: The left hand crank arm is lightweight and small size, and has standard precision cutting of hole, which ensures perfect fit for bike, easy to install and use. [Wide Application]: The left hand crank arm 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 Color: Black Size Chart: 21.5cmx4cmx3.5cm/8.46inchx1.57inchx1.38inch Package Includes: 1 Bike Crank Arm Note: Please allow slightly errors due to manual measurement and different monitors. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store