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Harken Block 12:1 Mainsheet Carbo Ratchamatic Base

$490.35 each

SKU: 56-9964 Categories: , ,

Product Description

Harken #HSB378 is a 57 mm triple fiddle with reinforced cam arms that is used for 12:1 mainsheet systems on beach cats.

Low-friction Carbo AirBlocks® are lightweight, strong, reliable and affordable. Companions to the popular Harken® Black Magic® line, these small, compact blocks have very high working loads for safe, easy trimming.


  • Sheave Diameter: 2-1/4″
  • Length: 6″
  • Maximum Line Diameter: 3/8″
  • Shackle Pin Diameter: 1/4″
  • Maximum Working Load: 2380 lb.
  • Harken #HSB378

Note: Maximum working loads and breaking loads for blocks are based on cam strengths.

Special order item.

Additional information

Weight 1.4 lbs

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