Pro Reservoir Cap Kit. RFX Pro Series Reservoir Covers are CNC machined from aerospace aluminum and are a perfect factory style replacement to your standard reservoir covers. Features: CNC machined from aerospace-grade aluminum. Tighter tolerances than O.E.M. cast part. Highly polished then color anodized for that factory look. Laser-etched RFX logo. Available in a variety of colors for a wide range of models. Sold as a set.