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Harken 100 mm Black Magic, AirBlock Loop Block
Cat. No. HAR 3245
Weight 2.3 lbs

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.

Sideplates and sheaves Hard Lube-anodized for maximum UV protection and a smooth surface.

Center cage keeps Torlon® roller bearings separated and parallel to reduce friction.

Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.


Sheave Ø (mm)100 mm
Sheave Ø (in)3 15/16 in
Length (mm)128 mm
Length (in)5 1/16 in
Weight (g)371 g
Weight (oz)13.09 oz
Maximum line Ø (mm)16 mm
Maximum line Ø (in)5/8 in
Maximum working load (kg)3402 kg
Maximum working load (lb)7500 lb
Breaking load (kg)6804 kg
Breaking load (lb)15000 lb

Manual:5004.pdf (open/save)
DWG:3245.DWG (open/save)
DXF:3245.DXF (open/save)
IGS:3245.IGS (open/save)
EPS:3245.eps (open/save)
High-res JPG:3245.jpg (open/save)

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