Our Transit Safari Rack comes with built-in Aluminum decking that's L-track compatible. As with all of our products, the construction is the highest quality. We are using a 1-1/4" round bar, and the decking is 3/16" Aluminum that's laser cut to allow for L-track stud mounting points, so you can easily mount up solar panels, MaxTrax, storage boxes, and other gear for your adventures.