Features: high-quality road and mountain bike left crank arm with diamond-shaped hole design, suitable for bicycle repair and replacement. Made from high-quality steel for lightweight performance, high strength, excellent resistance to deformation, and long-lasting durability. Smooth polished finish with a stylish and durable coating that resists fading. Precision-engineered standard sizing ensures a secure fit and easy installation on compatible bicycles. Available crank arm lengths: 170mm, 165mm, and 152mm. Crank arm design prevents overlap with chainring bolts. Compatible with various bicycle models, ideal for routine maintenance or upgrades. Specifications: Material: Steel Size: 152mm, 165mm, 170mm Color: Black Note: 1. Please allow 1–2 cm variation due to manual measurement. Ensure you are comfortable with this range before ordering. 2. Due to differences in monitor displays, actual color may vary slightly from the image. Package Includes: 1 x Left Crank Arm