Features: Engineered left crank arm crafted from high strength aluminum alloy ensures durability and seamless compatibility with 10 slot cranksets. Featuring a 170mm hollow structure optimized for weight reduction, this repair crank delivers resistant and absorption for consistent drivetrain . Designed for cyclists requiring grade replacements or upgrades to maintain compatible crank systems. Enhances pedaling efficiency during commuting, trail riding, or long distance with its dampening aluminum construction. machined precise chainring alignment and secure installation, backed by stress tested engineering for year round cycling reliability. Specifications: Color: Black Aluminum alloy Size: 22x4.4cm Suitable for the repair of the left crank of 10 slot Package Includes: 1x left crank note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.