Product Description

Use 57 mm Black Magic® AirBlocks® on offshore boats. These strong, lightweight blocks are sculpted aluminum, with Torlon® rollers and carbon-black balls for strength and UV protection. Rollers are housed in a unique center cage and are isolated for less friction. Blocks feature a three-way head system and come in high- and low-load configurations.

Use for:
Sheets, Halyards, Running backstays and Control lines.

Part Number: 3218
**Replaces 1961

Imperial Metric
Sheave Dia. - 57 mm
Length 6" 152 mm
Weight w/Shackle 12.43 oz 352 gr
Shackle Pin Dia. 5/16" 8 mm
Max Line Dia. 7/16" 12 mm
Maximum Working Load 3600 lbs 1633 kg
Breaking Load 7200 lbs 3267 kg
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Harken 57mm HL Double Block w/Becket
Original Price: $ 387.45
Price: $ 340.96

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