b'NEW 7310.21 5/16, 7310.21 3/8, 7310.21 7/16MKIV Ocean Unit 0 7510.307511.30Typical Boat Length 6.5 - 9.1 m (22\' - 30\')Wire(1 x 19 SS) RodClevis pin 4, 5, 6 mm (5/32", 3/16", 7/32") -4, -6 (4.37, 5.03 mm) 7.9, 9.5, 11.1 mm (5/16", 3/8", 7/16" )Headstay Length Standard 11.77 m (38\'7"); max 13.9 m ( 45\'7")Part No.Description 7510.10Furling system Toggle Assembly Required - sold separately7410.20 5/16Eye/jaw reversible toggle assembly with 7.9 mm (5/16") clevis pin7510.31 7410.20 3/87511.31Eye/jaw reversible toggle assembly with 9.5 mm (3/8") clevis pin7410.20 7/16Eye/jaw reversible toggle assembly with 11.1 mm (7/16") clevis pin 7310.21 5/16 Long link plate with toggle assembly with 7.9 mm (5/16") clevis pin7310.21 3/8Long link plate with toggle assembly with 9.5 mm (3/8") clevis pin 7310.21 7/16 Long link plate with toggle assembly with 11.1 mm (7/16") clevis pinOptional Parts7420 -4 7510.30Extra 2.13 m (7\') luff foil extrusion7421 -6 7510.31Extra 153 mm (6") connector with bushings7310.21 5/16 7422 -8 -4 rod adaptor stud (threadUNF 7/16") * 7310.21 3/8 7423 -107420 -4 7421 -6 6 rod adaptor stud (threadUNF 7/16") * 7424 -12- 7310.21 7/16*Use with conventional turnbuckle.MKIV Ocean Unit 1Typical Boat Length 8.3 - 11 m (28\' - 36\')Wire(1 x 19 SS) RodClevis pin 6, 7, 8 mm (1/4", 9/32", 5/16") -8, -10, -12 (5.72, 6.35, 7.14 mm) 12.7, 15.9 mm (1/2", 5/8")Headstay Length Standard 13.99 m (45\'11"); max 16.12 m (52\'11")Part No.Description 7410.20 5/167511.10Furling system7410.20 3/87410.20 7/16Toggle Assembly Required - sold separately 7411.20 1/27311.20 1/2 7411.20 1/2Eye/jaw reversible toggle assembly with 12.7 mm (1/2") clevis pin7311.20 1/2Jaw/jaw toggle assembly with 12.7 mm (1/2") clevis pin Stud/jaw toggle assembly with 15.9 mm (5/8") clevis pin (threadUNF 5/8" LH) 7311.20 5/8 7311.21 1/2 Long link plate with toggle assembly with 12.7 mm (1/2") clevis pin7311.21 5/8Long link plate with toggle assembly with 15.9 mm (5/8") clevis pin Optional PartsExtra 2.13 m (7\') luff foil extrusion 7511.30 7511.31 Extra 178 mm (7") connector with bushings 7422 -8-8 rod adaptor stud (threadUNF 1/2")*7423 -10-10 rod adaptor stud (threadUNF 1/2")*7424 -12-12 rod adaptor stud (threadUNF 5/8") * 7311.20 5/8 *Use with conventional turnbuckle.7510.10 7311.21 1/2 Essence 33, 10.13 m, Hoek Design, Essence YachtsMichel Hof/Essence Yachts photo 7511.10 7311.21 5/8188'