Blocks
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45mm Black Magic loop blockSKU: HK3389Black 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
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16mm Airblock forkheadSKU: HK376The 16 mm is Harken's smallest racing block. It is perfect for small control lines (up to 5 mm ) found on small sailboats and boats up to 30 foot. The bearing system uses stainless steel balls and has a 113 kg maximum working load, a breaking load of 544 kg and it weights just 11 gram. Learn More
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16mm AirblockSKU: HK404HHHarken's smallest 16 mm racing block. It is perfect for small control lines (up to 5mm ) found on small sailboats and boats up to 30 foot. The bearing system uses stainless steel balls and has a 113 kg maximum working load, a breaking load of 544 kg and it weights just 10 gram. Learn More
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16mm Airblock with becketSKU: HK405The 16 mm is Harken's smallest racing block. It is perfect for small control lines (up to 5mm ) found on small sailboats and boats up to 30 foot. The bearing system uses stainless steel balls and has a 113 kg maximum working load, a breaking load of 544 kg and it weights just 12 gram. Learn More
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16mm cheek blockSKU: HK416The 16 mm is Harken's smallest racing block. It is perfect for small control lines (up to 5mm ) found on small sailboats and boats up to 30 foot. The bearing system uses stainless steel balls and has a 113 kg maximum working load, a breaking load of 544 kg and it weights just 12 gram. Learn More
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16mm Airblock through-deckSKU: HK421The 16 mm is Harken's smallest racing block. It is perfect for small control lines (up to 5mm ) found on small sailboats and boats up to 30 foot. The bearing system uses stainless steel balls and has a 113 kg maximum working load, a breaking load of 544 kg and it weights just 18 gram. Learn More
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16mm Airblock cheek pivotSKU: HK432The 16 mm is Harken's smallest racing block. It is perfect for small control lines (up to 5mm ) found on small sailboats and boats up to 30 foot. The bearing system uses stainless steel balls and has a 113 kg maximum working load, a breaking load of 339 kg and it weights just 11 gram. Learn More
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16mm Airblock with eyestrapSKU: HK442The 16 mm is Harken's smallest racing block. It is perfect for small control lines (up to 5mm ) found on small sailboats and boats up to 30 foot. The bearing system uses stainless steel balls and has a 113 kg maximum working load, a breaking load of 544 kg and it weights just 12 gram. Learn More
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16mm Airblock narrow ferrule head blockSKU: HK467The 16 mm is Harken's smallest racing block. It is perfect for small control lines (up to 4mm ) found on small sailboats and boats up to 30 foot. The bearing system uses stainless steel balls and has a 113 kg maximum working load, a breaking load of 339 kg and it weights just 12 gram. Learn More
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57mm Block Single Loop (loop not includedSKU: HK3214Black 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
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57mm Aluminium Footblock - LockoffSKU: HK3221Use footblocks to redirect lines on the deck. Footblocks with lockoffs temporarily secure sheets. Learn More
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75mm Block Single Loop (loop not includedSKU: HK3230Black 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
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75mm Aluminium Footblock - Black MagicSKU: HK3234Use footblocks to redirect lines on the deck. Footblocks with lockoffs temporarily secure sheets. Learn More
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75mm Air Runner Block Single/BecketSKU: HK3239Runners are used on running backstays of offshore boats to adjust mast bend for different wind conditions. Learn More
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100mm Air Runner Block SingleSKU: HK3251Runners are used on running backstays of offshore boats to adjust mast bend for different wind conditions. Learn More
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Series 40 Ball Bearing Orbit Block Single RF45101SKU: RF45101Ultra LightWeight . Low friction 2-stage Orbital ball bearing system. Highest working load in its class. Low profile and compact. High performance cleating. Easily fitted and securely retained Dyneema® Link head Learn More
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Series 40 Ball Bearing Orbit Block Single, becket RF45111SKU: RF45111Ultra low profile becket
Easily fitted and securely retained Dyneema® Link head Learn More -
Series 40 BB Orbit Block, Cheek RF45151SKU: RF45151Base suits curved mounting surface. Low mounting points for maximum strength Learn More
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Series 40 Ratchet Orbit Block Single, AutoSKU: RF46101Now you can enjoy the flexibility of setting up your fitout exactly to suit yourself. Ronstan is the only company that offers a 40mm ratchet block with both auto and manual engagement models* Learn More
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Series 40 Ratchet Orbit Block Single, ManualSKU: RF46102Manual modes allow the ratchet mechanism to be switched on or off as required. This is the preferred mainsheet set-up for many top sailors. Learn More