The Permanent Mount Tent Trailer Rack mounts directly to the tent trailer rooftop. ProRac engineered mounting technology is utilized providing a simple, but incredibly strong mounting platform. A UV stabilized Santoprene footpad is fitted to the UV stabilized super tough Nylon foot sealing and preventing roof rack vibration. The rack offers a rugged aerodynamic design and is completely adjustable accommodating a variety of applications. The Pro-File crossbars are designed with a unique profile extruded from Aluminum 6063 alloy giving you a hefty 150-pound total load capacity (consult manufacturer for Tent Trailer roof weight limitations). Aluminum construction provides strength and rigidity while being lightweight and corrosion resistant.