Thule Caprock Roof Platform Railing Kit - Adjustable railing kit quickly transforms your Thule Caprock roof platform into a versatile cargo basket. Features Side rails provide a barrier to keep gear such as bags, coolers and containers secure within the perimeter of the platform Each side rail attaches and detaches independently, allowing you to create different configurations depending on what you would like to carry Railings include full-size t-slot grooves to provide additional tie-down points to secure your gear Includes four railings that easily install to your Thule Caprock roof platform