Thule Atlantis Rooftop Cargo Box Silver version - carries 21 cubic feet or up to 110 lbs of cargo per box QuickGrip Mounting System Holds 6-8 pairs of skis up to 198cm or 110 lbs 4-6 snowboards Also mounts to most factory-installed racks and after-market systems Durable lid stiffeners and struts make opening and closing the lid effortless - even with one hand