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  1. 57mm Block low-load single swivel
    SKU: HK3226
    Black Magic Air blocks are a top favorite of Big Boat performance racers and cruisers. These lightweight, free-running, powerful performers are used for sail controls that see lots of action: mainsheet, runner, halyard, and spinnaker systems.  Learn More
    €208.95 €208.95
    Harken
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  2. 57mm Block Stand-up incl. padeye 6mm (1/4") fastener circle 37mm (1 15/32
    SKU: HK3227
    Black Magic Air blocks are a top favorite of Big Boat performance racers and cruisers. These lightweight, free-running, powerful performers are used for sail controls that see lots of action.  Learn More
    €379.95 €379.95
    Harken
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  3. 57mm Block single / low-load / becket swivel
    SKU: HK3229
    Black Magic Air blocks are a top favorite of Big Boat performance racers and cruisers. These lightweight, free-running, powerful performers are used for sail controls that see lots of action: mainsheet, runner, halyard, and spinnaker systems. Learn More
    €263.95 €263.95
    Harken
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  4. 2.25" Upright Lead Block #10 (5mm) RH Fasteners
    SKU: HK206
    The 2.25 in (57 mm) blocks are compact and lightweight, with fast trim and release under high or low loads. Perfect for dinghies, scows, beachcats and iceboats, as well as small offshore racers and cruisers. Learn More
    €83.49 €83.49
    Harken
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  1. Brands
    Harken
  2. Brands
    Ronstan
  3. Model
    57 mm
  4. Safe Working Load (kg)
    < 1500
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Brands
  1. Harken 44 items
  2. Ronstan 0 items
Block type
  1. Becket 13 items
  2. Cheek 4 items
  3. Stand-up 2 items
  4. Fiddle 4 items
  5. Fiddle / becket 4 items
  6. Loop 1 item
Series
  1. Black Magic 6 items
  2. Carbo 37 items
  3. Classic 1 item
Model
  1. 29 mm 17 items
  2. 40 mm 34 items
  3. 45 mm 18 items
  4. 57 mm 44 items
  5. 60 mm 15 items
  6. 75 mm 27 items
  7. 80 mm 1 item
  8. Big Bullet 4 items
  9. Bullet 11 items
  10. Dinghy 1 item
  11. T2 13 items
Bearing
  1. Ball bearing 38 items
  2. Needle bearing 6 items
Sheaves Ø
  1. 57 mm 2 items
Cam
  1. Yes 17 items
  2. No 27 items
Swivel
  1. Yes 38 items
  2. No 6 items
Ratchet
  1. Yes 20 items
  2. No 24 items
Max rope diameter
  1. 10 mm 37 items
  2. 12 mm 7 items
Number of sheaves
  1. 1 22 items
  2. 2 11 items
  3. 3 9 items
  4. 4 1 item
  5. 5 1 item
Breaking strength (kg)
  1. < 1500 24 items
  2. 1500 - 3000 20 items
Price
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