This kit creates a full size rack that sits above your Isuzu D-Max X-Terrain's truck bed. This Slimline II cargo carrying rack kit contains the Slimline II tray (1345mm x 1156mm) and 4 feet that fit into the existing tracks. All Front Runner Rack Kits contain installation instructions as well as all the components needed to mount the Slimline II Tray to your vehicle. All Front Runner Racks are backed by a Limited Lifetime Warranty*Note: If your Roll Top extrusion has a 6mm (0.24'') to 7mm (0.28'') slot opening, you may need RRAC962 for installation.