Specification: Material: Aluminium Alloy Options: Black-Square Hole; Black-Rhombic Hole; Silver-Square Hole; Silver-Rhombic Hole Total Length:Approx. 20.5cm / 8.07in Hole Distance: 170mm Fit for: Left side Weight: Approx. 200-214g Note: 1.Pay attention to the shape of the inner hole of the crank. The hole in the middle of some cranks is diamond-shaped, and the hole in the middle of some cranks is square. 2.Before purchasing, you need to confirm the inner shape of the original handle.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package Included: 1 x Crank Arm 170mm Crank Arm Length: 170mm crank arm length, crank arm and chain bolt without any overlap, Bike Crank Arm has two kinds of empty optional, a square hole, two is a diamond hole, you need to choose. Fine Polished Design: The surface of bicycle left crank hand is fine polished design, the surface is coated with high-quality paint, do not fade, the color is fashionable and generous, most of them like it. Standard Precision Cut Hole: Left single chain crank arm has a standard precision cut hole to ensure a perfect fit to the bike, easy to install, and very portable to carry around. Characteristics of Light Weight: Left crank arm is made of high quality aluminum alloy, which has the characteristics of light weight, high strength and durable deformation resistance. Compatible with Bike Models: Aluminum alloy crank arm is a good substitute for bike maintenance, compatible with a variety of bike models, widely applicable to road bikes, mountain bikes, folding bikes, fixed gear bikes, etc.