Wind Noise Reduce: C-Shape tube is aerodynamic which will improve stability and reduce wind resistance under high speed. Also we provide rubber strips that you can mount them on the crossbar channels to reduce wind noise

Adjustable Base: The steel mounting brackets of truck cap ladder rack can be flexibly adjusted to fit different bed lengths and widths. Accommodate a range of truck models and different size of your truck roof, or truck cap, camper shell, trailer topper, canopy topper

Versatility: Crossbars are designed with t-slot channels, you can install various cargo via t-screws (Not Provide!), such as bike, kayak, roof-top tent, etc. Increase your storage space and make your vehicle organized

Extruded Aluminum: Truck cap roof ladder rack is made of reinforced aluminum, ensuring maximum strength while remaining lightweight. The workmanship quality is beyong your expectation, maximum weight capacity is 500 lbs

Drilling Needed: Before mounting truck topper roof racks, you need to drill holes on your flat roof. We provide necessory mounting hardware for you to install camper shell roof rack, easy to assemble.

Product Information: 2pcs 50" pickup topper ladder racks, 4pcs 3.3" steel mounting base( 3mm thick). And height clearance is 5.25"