Gear Cassette Spacer Kit, Flywheel Gasket, Bike Flywheel Hub Spacer Bicycle Bottom Bracket Axle Washer Gasket Superior Performance: Bike washers are great for adjusting your bike bottom bracket, flywheel or hub, directly replacing old or broken ones, giving you a better riding experience High Quality Aluminum Alloy: The flywheel spacer is made of aluminum alloy, which is rust and corrosion resistant, strong and durable, and has a long service life without frequent replacement Three Different Sizes: three sizes of gasket spacers, 1mm + 1.5mm + 2mm, which is convenient for you to choose the right thickness according to your actual requirements Easy Installation: The flywheel gasket is easy to install and disassemble, light in weight, no complicated operations are required during installation, saving time and effort Wide Range of Applications: These bicycle cassette spacers are widely used on mountain bikes and road bikes Colour: Black Size: Thickness 1mm, 2mm, 3mm Quantity: 5sets Kind tips: 1.As different measuring methods,it will occur 1-3 cm deviation about the items,please ensure that it is okay for you before ordering. 2. Because of different monitors and lamplight, the picture may not reflect the actual color of the item, really thank you for your kind understanding. 3. Only the above package contents, excluding other products.