Features: Made of premium 7075 aluminum alloy,lightweight and durable. Easy to install on your bikes and bring cool color for your bike. Easy to install the bolts on your bike with 5mm inner hexagon spanner(not included). Fit for universal single chainring/chainwheel used. Suitable for most of mountain bikes and road bikes. Specification: Color: Black/Red/Blue/Green/Purple/Gold/Silver/Pink (optional) Material: 7075 aluminum alloy Weight: Approx 1.5g/0.05oz for each Package weight: Approx. 15g/0.5oz Package List: 5* Chainring Bolts NOTE: Please ensure the size for correct fit.Details please see the size picture.