C. Sherman Johnson Splice Line Large Boat Kit f/Boats up to 40 [SLK-40]Splice Line Large Boat Kit for Boats up to 40' C. Sherman Johnson Marine's Splice Line fittings allow you to easily splice hi tech Dyneema line to standard life line fittings. The Splice Line fittings are designed to be light weight and easy on the line. Both US Sailing and ISAF now allow Dyneema Spectra life lines for offshore racing and Dyneema Spectra is also a great product for the cruising sailor that wants to replace their stainless steel life