Ideal for jib and spinnaker sheets. 16 Plait Polyester Outer Cover Excel Racing with Dyneema SK75 Core High strength, low stretch dinghy control line. Excel Racing core provides the strength where the rope isn't handled. Excel Racing cover can be stripped again to reveal high strength, lightweight Dyneema core. Easy to taper - simply pull back outer sheath, cut off to required length and sew and whip to centre core.