Made from CNC machined 6061-T6 aluminum. Anodized colors for corrosion resistance and to give your bike a factory look. Only works on models Compatible with Brembo brake and clutch components. Tusk reservoir caps are CNC machined from lightweight 6061-T6 aluminum for a perfect fit to replace your stock reservoir cap. Reservoir caps are anodized for corrosion resistance and to give your bike that factory look.