SportRack Vista XL Rear Opening Cargo Box (Black, 18 Cubic Feet) ABS construction that is durable and UV-resistant Rear opening for easy access away from traffic U-Bolt hardware mounting kit Includes lock to secure contents in the box Fits SportRack Roof Rack Systems, square, round and most factory racks (Check fit guide) Dimensions- 19 H x 63 L x 38 W inches. 42 lbs