Canoe Car-Top Carrier KitPart #: 11437-7A simple, convenient kit for carrying a canoe or small boat on car top. Includes four supporting foam blocks that snap on boat&';s gunwale and help prevent scratches on car top. Two straps with adjusting buckles and clips. Includes 20&'; of polypropylene rope and S-hooks to secure bow and stern to bumpers. Straps are sturdy poly web with vinyl-coated clips.WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.