Dorsal Surfboard Kayak SUP Surf Roof Rack Tie Down Straps 15FT Black Pair Surfboard Rack Tie Down Straps - Black The DORSAL tie down straps features aanodized1" cam buckle and buckle pads to protect your board. Thepair comes in a 15ft length and comes with in set of two straps. Used to secure Surfboards SUP canoes and kayaks 15 feet long and 1 inch wide 200 lb. working load limit 600 lb. break strength Designed by DORSAL in the USA.