These sides are used in conjunction with the SSBS001to create a box platform for you to fit your owncustom made wooden deck. Made from mild steel. Black powder coated for additional protection and for an aesthetically pleasing finish. Allows for the storage and protection of your Front Runner Cub Packs and Wolf Packswhen the top has been fit top not supplied This platform can be usedto mount a vehiclular fridge/freezer ontop of or strap down any other cargo you may have.