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Harken 2151 57mm Carbo T2 Loop Soft-Attach Block

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Harken 57 mm Carbo T2 Loop Soft-Attach Block

The high-strength composite T2™ is the first block with no metal shackles or rivets. It is used for traveler controls, mainsheets and vangs, cascades, bridles, and other systems where small, lightweight blocks are called for.

The composite sheave spins on ball bearings with curved bearing races for low-friction rolling. Composite sideplates are fiber-reinforced, high-strength nylon resin. Ball bearings, sheave, and sideplates are UV-stabilized for maximum lifespan.

The T2 Loop’s on/off loop system slides through the block head and over the anchor post for a secure connection. A SK75 Dyneema® loop is included. Replacement loops available.


  • Sheave Ø (mm) - 57 mm

  • Length (mm) - 79 mm

  • Weight (g) - 59 g

  • Maximum line Ø (mm) - 10 mm

  • Maximum working load (kg) - 359 kg

  • Breaking load (kg) - 1080 kg

  • Includes - 2155 loop