Package included:
2 x Bungee Dock Line

Warranty:
We are very confidence with our product, our bungee dock lines warranty for 1 year from date of purchase.
Warranty type: Exchange or replacement

Specification:
Dock Rope Material: Nylon
316 Stainless Clip: Rust proof, perfect use for both saltwater and freshwater. (Note 316 stainless is the only material that can use in marine environments.)
Natural Length: 4 feet
Stretch Length: 4 feet that stretches to 5 1/2 feet;
Loop Max size: 10 inch.
Docking Boat and PWC: Up to 4000 pounds.
Tensile Strength: 2,150 pounds, keep a 23ft boat secure to dock.
Two foam bumper in the end: It prevents your boat from being chafed when quick docking.
Bungee dock line can absorbs shock to boats, cleats, docks, pylons and other hardware.

Are these ideal for tying up to other boats when the water is rough or waves are rolling around?
Yes, that's what our bungee dock line design for. If you use the regular rope to tie off your boats to the dock, your boat may easy to run-away because the waves would bump them around until the rope came loose. But our bungee dock lines have a lot of elasticity and can bump around but stay attached to keep your boat secure on water.

How many of these do you need to secure a PWC to a dock?
You will need at least two to secure the front and the rear of your PWC. This goes for almost all water craft as well. You need two points of restraint to prevent rotation when tying to a dock.