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Harken 125mm Black Magic Swivel Block

$782.70 $688.99
(You save $93.71)
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Harken 125mm Black Magic Swivel Block

The Harken Black Magic Air Blocks have been redesigned with a sleek new look. Their unique, performance packed engineering remains exactly the same.

Used on offshore boats, these strong, lightweight blocks feature free-rolling, high load Torlon® roller bearings for a high strength-to-weight ratio and reduced wear. Rollers are housed in a center cage and stay parallel for low-friction efficiency. Sculpted hardcoat-anodized aluminum sideplates protect sideload ball bearings. Dissimilar metals are isolated to minimize corrosion.

Like all Air Blocks, the three-way head can be locked in either direction or can swivel freely to keep line from twisting.

Use for:

Sheets, Halyards, Running Backstays, Control Lines



  Imperial Metric
Sheave Diameter 4 15/16 in 125 mm
Max Line Diameter 3/4 in 19 mm
Max Working Load 11,000 lb 4,990 kg
Breaking Load 22,000 lb 9,977 kg
Weight 37.31 oz 1,058 g
Length 10 in 254 mm
Shackle Pin Diameter 1/2 in 12 mm