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Allen Dinghy Accessories — Sheave Boxes Keelboat
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| Specially designed for keelboat halyard entry and exit boxes with special side flanges to reduce jamming. All sizes are suitable for ropes up to 10mm in diameter. A8 and A8A have nylon casings. A 28 is anodised aluminium casing.  |
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| Part | Description | Sheave width mm |
Sheave Dia mm |
Slot Size mm |
Weight gm |
Hole Centres mm |
Hole Size mm |
Photo | |
| AL-0008 | Nylon sheave box (nylon sheave) |
12 | 38 | 69 x 24 | 41 | 80 | 4 |
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| AL-0008-A | Nylon sheave box (alloy sheave) |
12 | 38 | 69 x 24 | 65 | 80 | 4 |
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| AL-0028 | Plain bearing alloy sheave box |
12 | 38 | 55 x 23 | 87 | 87 | 6 |
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