The Malone Auto Racks Standard Rooftop Kayak Carrier Kit includes everything needed to safely transport one kayak. The 14-inch blocks feature a universal cut-out profile that fits round, square, or oval rooftop crossbars. It includes two 15-foot load straps and safety tie-downs. Bow and stern safety tie-downs are required for all Malone rooftop transport(s). Failure to correctly install and use safety tie-down lines voids all warranty and liability.