Features: brand new and high quality. Lightweight and don'for t add any burden to your bike. Made of aluminium alloy material, high hardness, strong and durable. Size: approx 42x24mm or 1.65x0.94 inches. Suitable for most bicycles, such as mountain bike, road bike, etc. We offer 3 kinds colors optional, you can choose one or more according to your needs. CNC cutting, round and smooth edges, fine and smooth. Specifications: Material: Aluminum Alloy Size: approx 42x24mm or 1.65x0.94 inches Color and Type: Black Left or Black 1 Pair or Black Right or Gold Left or Gold 1 Pair or Gold Right or Red Left or Red 1 Pair or Red Right 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. Package includes: 1x Front Derailleur Clamp Ring