Features: Full CNC ultra-light hollow, exquisiteanodized surface treatment. Anodic oxidation treatment, no rust, corrosion resistance, beautiful color. Made of aluminum alloy, anti-rust, for extra strength and durability combined with low weight. Bright colors could perfectly matches your cool bike. This cup holder is unique in design and easy to operate. Specifications: Material:Aluminium Alloy Color:Black,Red,Gold,Silver,(Optional) Size:Approx.108x64mm/4.25x2.52in Weight:about 43g Note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Bottle Cage