SK38
Popular for cruising boats where the stretch of Polyester is not acceptable but where they are not prepared to go with the pricing levels of SK 78 or SK 99.
SK 99
Really top of the line low stretch. This would be the rope of choice for large high-end race boats. It would be approximately. 40% stronger than SK78 and used for a boat s ultra-strength bearing needs such as Code 0 halyards, Tack lines and perhaps even headsail halyards. On average, it would be about 70% more expensive than SK78. Stretch level would be less than 1%
Alex Thomson s Hugo Boss Open 60 with all rope, mainly SK99, leading back inside the cockpit