Harken 57mm Carbo Air T2 Double Block
The Harken 57mm Carbo Air T2 Double Block is a lightweight soft-attach block designed for compact multi-part purchase systems where strength, efficiency and minimal weight are critical. As part of the Carbo Air T2 range, it uses Harken’s composite construction to eliminate metal shackles and rivets, delivering an exceptionally strong block with a very low overall weight.
This double-sheave version is supplied with a length of high-strength lashing line, allowing the block to be securely lashed, spliced or tied directly to padeyes, deck fittings or rigging points. The soft-attachment method creates a low-profile connection and allows the block to align naturally with the load, improving efficiency and reducing friction in the system.
Both 57mm composite sheaves run on low-friction bearings and are suitable for lines up to 11mm. This configuration allows sailors to create compact purchase systems while maintaining smooth line handling and high load capacity.
Despite weighing just 107.5g, the block offers a maximum working load of 490kg, making it suitable for higher-load running rigging systems such as vang purchases, mainsheet systems and powerful control line cascades on dinghies, sportboats and performance sailing yachts.
Key Features
- 57mm Carbo Air T2 double soft-attach block
- Supplied with lashing line for secure soft attachment
- Lightweight composite construction with no metal shackles or rivets
- Twin 57mm sheaves running on low-friction bearings
- Maximum Working Load (MWL): 490kg
- Weight: 107.5g
- Suitable for lines up to 11mm
- Soft attachment allows the block to align naturally with the load
- Ideal for vang purchases, mainsheets, cascades and performance control systems
In the 57mm T2 Range
The 57mm T2 Double Block forms part of Harken’s wider 57mm Carbo Air T2 family, which also includes the quick-attach T2 Loop Block, the standard single block, and Ratchamatic® blocks (including the 2× Grip version), all designed to deliver lightweight, high-efficiency performance for modern sailing rigging systems.
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