HARKEN Premium Sailing 57mm HL Black Magic Air Triple Boat Block, 57mm, Part 3219

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HARKEN Premium Sailing 57mm HL Black Magic Air Features

• Blocks are easily disassembled with a single hex wrench

• Either metric or imperial flathead fasteners may be used for mounting and are not exposed

• Dissimilar metals are isolated to minimize corrosion

About HARKEN Premium Sailing 57mm HL Black Magic Air

The entire line of black magic airblocks has been redesigned with a sleek new look. Their unique, performance-packed engineering remains exactly the same. Carrying some of the highest loads imposed by running rigging, these strong, lightweight blocks feature torlon; roller bearings housed in a center cage. Rollers stay parallel for low-friction efficiency. Sculpted hardcoat-anodized aluminum sideplates protect sideload ball bearings.