Thule 687 Atlantis 1800 Rooftop Cargo Box (Silver) Solid ABS Construction - Installs in seconds with Quick Grip Mounting hardware Access Gear from eith side of car using Dual Side opening feature Mounts to most removable and factory installed racks - consult fit guide for details 18 cubic foot capacity - 84" long by 34.4" by 16.9" high Thule's most popular selling cargo box