Absorbs Shock to Boats, Cleats & Docks. 4' Length stretches up to 5.5'. Recommended for Boats, PWC's, Kayaks & Pontoons up to 4000 lbs. Bungee Cord is inside Rope and acts as Line Snubber. Foam Floats act as Sliding Adjustment for Quick Docking. Stretches as Boat Drifts and gently pulls back. 10" Loop on both ends and Slider allows easy attachment to boat and dock. Intended for day use, not overnight docking.