Features: - for adjusting your bottom bracket, flywheel or hub. With 3 different sizes of bracket axle washer gaskets, 1mm thickness, 1.5mm thickness and 2mm thickness, you can choose the right thickness to replace the old or bad gasket. - Suitable for mountain bike, road bike. This cycling bottom bracket axle washer will help you have a better riding experience. - Constructed of aluminum alloy, which is very strong and The headset spacer can be used for a long time, no need to replace it frequently. - Lightweight and easy to install and remove. You can install or remove this flywheel hub spacer in a short time without others' help, save your time and enjoy your cycling time. Specification: Material: Aluminium alloy Color: Black Thickness: 1mm+1.5mm+2mm Package List: 3 * Gasket