Sold as a pair. Aluminum finish. Compatible with the tubular side-fits Case™ holders PLxxx, PLRxxx, PLOxxx, PLORxxx. Wirelease System: The cases are detached from the side frame by turning an external knob that is equipped with a cable system (patent pending), placed directly under the Security Lock. It is not necessary to turn the knob to attach the cases. Hold it easy System: The Trekker Dolomiti has a hook system (patent pending) allowing it to be tilted without releasing it completely from the frame. This mechanical system has been specifically designed to prevent the cases from being accidentally dropped and to facilitate loading and unloading even if there is a bulky central top-fits Case™, which could make it difficult to access and open the lid. Note: The ''Hold It Easy System'' is not compatible with some Monokey frame models (it is included with the fits Case™ and is supplied detached from the fits Case™ to avoid transport issues. The customer can decide whether to install it). Note: Not compatible with PL_CAM mounts for Outback cases.