Fine Material: The left crank arm is specially made and designed with firm and durable aluminium alloy. Compatibility: The left crank arm is generally designed for replacement for 590/596/610//. Fine Replacement: The bike crank handle can be regarded as the fine replacement when the old one needs replacing. : The bicycle crank arm is made to be small and , so it will not bring too much pressure to your bike. Left Side: Please kindly note before buying that the bike part is only suitable for the left side. Specification: Color: Black Material: aluminum alloy Size: . 220x45x27mm/8.66x1.77x1.06inch. Compatibility: Replacement for 590/596/610// Distance Between Holes: 170mm. Package Contents: 1 x bicycle crank arms Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.