SportRack A90275 Aero XL Roof Box Plastic 18 cu. ft. (509 liter) capacity Mounts directly to most OEM and aftermarket crossbars with included Quick Release u-bolt mounting kit Rear-opening design includes a lock for secure, easy access ABS construction is durable and UV-resistant Dimensions: 63"(l) x 38"(w) x 19"(h) / 38 lbs (17 kg), Maximum load of 110 lbs (50 kg)