The YakGear Railblaza SidePort is a unique variation of the StarPort base for use on vertical surfaces. It allows for use of a full range of Railblaza accessories. Made from high-grade engineering plastics, the SidePort is easily installed on kayaks, canoes, power boats, sail boats and ATVs. Slide locking mechanism for perfect positioning. Installation hardware included. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Mount.