For boats 4-6 m (14-20 ft) /Forestay Ø 4-7 m /Max. headsail size: 12m².Supplied complete for forestay, chainplates version : 6.75 mLuffrope diameter, finished 5 mmDrum sheet capacity 7 m, Ø 5 mm.For race enthusiasts, and also for sailors who find twin head sails more fun !Using the same materials as the S Series, the T Series («T», for Twin groove) is equipped in series with a double groove, which allows using the jib reefing as a hollow twin-groove forestay when racing. The twin groove also makes it possible to set twin head sails rather than hoisting the spinnaker.The new quick-coupling sleeves are screwed and make for a swift and easy installation directly on the tensioned forestay, requiring no unstepping of the mast and no modification of the forestay.406 T : for boats from 4 to 6 m (14 to 20 ft).The 406 T features all the advantages of a large headsail reefing sytem : Delrin twin ball bearing races in both drum and halyard swivel. All components are manufactured from polyarylamide.