
Harken Unit 3 MKIV Jib Furling System
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MKIV furling systems are strong, lightweight and aerodynamic, with the performance and features Harken® is known for. Longevity, ease of use, and simplicity of installation are crucial components of the design.
Specification:

| F maximum (mm) | 1286 mm | Wire Ø (1 x 19 SS) (mm) | 11,12 mm |
| F minimum (mm) | 1286 mm | Rod Ø (mm) | 11.1, 9.53 mm |
| G maximum (mm) | 467 mm | Rod Ø (dash) | -22, -30 |
| G minimum (mm) | 467 mm | Clevis pin Ø (mm) | 19.1, 22.2 mm |
| H maximum (mm) | 420 mm | Standard headstay length (m) | 22.76 m |
| H minimum (mm) | 420 mm | Maximum headstay length (m) | 24.89 m |
| I maximum (mm) | 188 mm | A (mm) | 186 mm |
| I minimum (mm) | 188 mm | B (mm) | 296 mm |
| J (mm) | 38 mm | C (mm) | 86 mm |
| K (mm) | 43 mm | D (mm) | 247 mm |
| Extrusion length (m) | 2.13 m | E (mm) | 121 mm |
| Luff tape size (mm) | 5 mm |
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