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Harken Black Magic
Air runner Blocks


Black Magic® Air Runners® are strong, lightweight blocks with extremely free-rolling sheaves. Blocks feature Torlon® roller bearings in a center cage for strength. Sideload bearing strips dampen rig vibration.Integrated sideplate bails and recessed cotter key help produce a smooth design that won’t snag lifelines. Heads are offered with parallel/perpendicular shackles. Tangs attach turnbuckles, toggles, and other fittings. No tools required for installation.Foam padded Block Socks easily install over Air Runners® to protect your blocks, deck, and crew.



Harken 57 mm Runner Block
Harken 57 mm Runner Block

Harken 75 mm Runner Block
Harken 75 mm Runner Block

Harken 75 mm Runner Block - Becket
Harken 75 mm Runner Block - Becket

Harken 100 mm Runner Block
Harken 100 mm Runner Block

Harken 100 mm Runner Block - Becket
Harken 100 mm Runner Block - Becket

Harken 125 mm Runner Block
Harken 125 mm Runner Block

Harken 125 mm Runner Block - Becket
Harken 125 mm Runner Block - Becket

Harken 150 mm Runner Block
Harken 150 mm Runner Block

Harken 150 mm Runner Block - Becket
Harken 150 mm Runner Block - Becket