Features: Made of aluminum alloy which is very strong and durable.Lightweight and easy to install and remove.Easy to install and remove.Perfect for adjusting the bottom brackets, flywheels, and hubs of your bike.Suitable for mountain bike, road bike. Specifications: Material: Aluminum alloy Color: as shown in the picture Thickness: 1mm + 1.5mm + 2mm Package List: 3 x Gaskets