Kayak Car-Top Carrier Kit. Part Num: 11438-7. A simple, convenient kit for carrying a kayak on car top. Includes two supporting foam blocks that snap on boats gunwale and help prevent scratches on car top. Two straps with adjusting buckles and clips. Includes 20 feet of polypropylene rope and S-hooks to secure bow and stern to bumpers. Straps are sturdy poly web with vinyl-coated clips.