The Sowester Topaz Outhaul Sheet, also known as a Cunningham sheet, is used to extend the sail across the boom and fasten it in place during sailing. The sail is attached to the line using a Rooster Topaz Clew Hook (sold separately).There are a few ways of making up a Topaz Sailing Outhaul. This version is a single line made from plaited polyester Marlow rope, giving it a low stretch, free-flowing, and easily cleated quality.Colour may vary from what is shown in the picture.FeaturesLow stretch and water absorptionMarlow 8 Plait, Pre-Stretched polyesterPolyester core