SportRack ABR526 Delux Safe Harbor 16-Inch Kayak Kit Everything you need to tie down and transport your kayak Two 16-inch closed cell foam blocks with non-skid underside to prevent movement on vehicle Two 15-inch polypropylene center straps with chromate buckles secure kayak to vehicle Two specially designed straps for front and rear tie-downs Fits Thule, SportRack, round, factory racks and bare roofs