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.
Sheets, Halyards, Running Backstays, Control Lines
|Sheave Diameter||2 15/16 in||75 mm|
|Max Line Diameter||9/16 in||14 mm|
|Max Working Load||5,000 lb||2,268 kg|
|Breaking Load||10,000 lb||4,536 kg|
|Weight||12.8 oz||363 g|
|Length||6 3/16 in||157 mm|
|Shackle Pin Diameter||5/16 in||8 mm|