This ultimate Optimist mainsheet is tapered and made of abrasion-resistant PES material. Thick and soft where it touches your hand. Thin and smooth elsewhere for free running control.FeaturesTapered on both endsTapered from 9 to 6.5 mmLong enough to create a 4:1 Optimist mainsheet with 2 boom blocksLine structure is approximately:2.0 meter: 6.5 mm2.0 meter: 9.0 mm3.0 meter: 6.5 mm