Far more sensible than regular rope Stretches and re-tightens to keep craft tight against the dock bumper even when the water's wavy Two foam floats keep line from sinking and protect boat's finish Ends have loops with slides for quick, easy docking Works on craft weighing up to 4,000 lb. (EU: 1814,37 kg) ; 2,150-lb. (EU: 975,22 kg) tensile strength. BUNGEE DOCK LINE-4 FT.