For boats 4-6 m (14-20 ft) /Forestay Ø 4-7 mm /Max. headsail size 12 m².Supplied complete for forestay, chainplates version : 6.35 mLuffrope diameter, finished 6.5 mmDrum sheet capacity 7 m, Ø 5 mm.It requires no unstepping of the mast, and no modification of the forestay, thanks to a unique (patented) design which allows quick and easy installation directly on the tensioned forestay. The inner PVC liner is clipped onto the forestay and the aluminium spar slides easily over the PVC liner.The risk of tearing sails at junctions is therefore much reduced.The unique design allows swift and easy installation directly on the tensioned forestay. Combined with the mounting of PVC and alloy spars alternatively, this system guarantees maximum performance and reliability on most types of yachts, without altering the boats original characteristics.406 S : for boats from 4 to 6 m (14 to 20 ft).The 406 S 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.