The RigWheels PortaRail Collapsible Speed Rail with Six 40″ Sections & Four Connectors includes 6 40″ sections, 4 threaded connectors, and 12 rubber end caps. These 40″ sections can be slid together using the connectors to make two 120″ rails for the PortaRail collapsible dolly/slider rail system (not included) with the RigWheels PortaRail Collapsible Speed Rail.\r \rThe rails are constructed from 6061 aluminum for rigidity, and provide precision camera movement. At 80\