Features: brand new and high quality Road mountain bike left crank diamond hole bicycle repair parts. Made of high-quality steel, light weight, high strength, strong resistance to deformation, durable and practical. Polished well, the lacquer is beautiful, does not fade, and is fashionable. Standard precision openings ensure a perfect fit to the bicycle and easy installation. The length of the crank arm is 170/165/152mm, and there is no overlap between the crank arm and the chain ring bolt. A good replacement for bicycle repairs, for many bicycle models. Specifications: Material: Steel Size: 152mm/165mm/170mm Color: Balck Package Includes: 1x Left Crank Arm note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.