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Harken 100mm Black Magic Swivel Double Block

$1,256.60 $1,105.99
(You save $150.61)
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Harken 100mm Black Magic Swivel Double 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 3 15/16 in 100 mm
Max Line Diameter 5/8 in 16 mm
Max Working Load 11,000 lb 4,990 kg
Breaking Load 22,000 lb 9,979 kg
Weight 45.28 oz 1,284 g
Length 8 15/16 in 227 mm
Shackle Pin Diameter 1/2 in 12 mm