Excellent quality with Lifetime warranty! Description About this item 【Upgrade System】T-slots of truck topper roof racks are more lightweight and sturdy, so convenient for you to install bike, kayaks, roof-top tent via T-screws. C-Shape Tube is aerodynamic which will improve stability and reduce wind resistance under high speed. 【Unique Design】The steel mounting base of truck ladder rack can be flexibly adjusted, fit for different size of your truck. The rubber strip provided can be attached to the truck topper cross bars to increase friction, keep stuff from sliding around. 【Premium Material】Truck cap roof ladder rack is made of reinforced aluminum, anti-rust and anti-corrosion. The workmanship quality is beyong your expectation, sturdy and reliable. Maximum weight capacity is 500 lbs. 【Wide application】Roof Rack Cross Bars can be mounted on any flat roof(Drilling Required), fits for truck cap, camper shell, trailer topper, pickup topper, canopy topper. Compatible with tacoma, toyota, dodge ram 1500, ford f150,250,350,etc. 【Kind Note】We provide M8 T-screws and if you need to install the topper rack into your existing track rails, please make sure that M8 T-screws fit for your track rail, otherwise, you need to but the suitable screws by yourself. 【Product Information】2pcs 72" pickup topper ladder racks, 4pcs 3.3" steel mounting base( 3mm thick). And height clearance is 5.25". Note: Fitment above is for reference only, please check the part number before you purchase. Please feel free to contact us if you are not sure whether the item is suitable for your need, we will check and reply you as soon as possible. Please kindly understand that the actual color and the size of the item may slightly vary from the presented pictures.