Thule 897XT Hullavator Kayak Roof Rack Mount Carrier Load and unload kayaks are waist level, at the side of the vehicle for greater convenience and safety Gas-assist struts lift and lower 40 pounds of kayak's weight--making it easy for one person to load Double extending arms lower the kayak by up to 40 inches for faster loading and unloading Fits Thule rack systems and round bars only Includes all straps to transport 1 kayak; up to 2 carriers per vehicle; limited lifetime warranty