Specification: Color: Green Yellow / Black Blue Red Dock Rope Material: Nylon Clip Material: 316 Stainless Natural Length: 4 feet Stretch Length: 4 feet that stretch to 5 1/2 feet; Loop Max size: 10 inches. Docking Boat and PWC: Up to 4000 pounds. Tensile Strength: 2,150 pounds, keep a 23ft boat secure to dock. Two foam bumpers in the end: It prevents your boat from being chafed when quick docking. Fit For: Work perfectly for Pontoon Boat, Bass Boat, Jon Boat, Center Console Boat, Jet Boat, Yacht, Jet Ski, Seadoo, Wave Runner, and so on. Features: No more knot. Docking without 10 seconds. Convenient, get on and off boat easily. Can use in rough water, the boat bump around but stay attached. Perfect length keep the boat nice and snug against the dock, makes it a breeze to jump on and off boat without having to pull the boat in. Dock lines are made of nylon material with 316 stainless steel clip, provide more strength to the loading and resistance to the saltwater and sunlight