29 mm Zircon Triple Block
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Harken 29 mm Zircon Triple Block
The Harken 29 mm Zircon Triple Block (Part No. 2189) is part of an expanded Zircon line that grew from eight to eighteen models with the addition of six new 29 mm sheave diameter variants. Designed specifically for control lines where multi-part purchases are required, this block is not intended as an all-purpose solution, but rather as a precision tool for high-performance sailing applications.
Zircon blocks are engineered to react immediately. When pressure gets light and you need to ease a 24:1 Cunningham rigged under the deck, or let the jib lead forward for more power through the chop, this block delivers the response you demand. Its compact dimensions — just 1 11/16 inches (43 mm) in length — and ultralight weight of 1.07 oz (30.4 g) make it well suited for dinghies, beachcats, and sportboats where every gram counts.
The block accepts line up to 1/4 inch (6 mm) in diameter and is rated for a maximum working load of 525 lbs (240 kg), with a breaking load of 1,575 lbs (720 kg), providing a generous safety margin for demanding racing conditions. Manufactured in the United States, the 2189 represents Harken's commitment to precision engineering and immediate mechanical response in small-boat hardware.
Key Features
- 29 mm sheave diameter — part of an 18-model Zircon range
- Triple block configuration for multi-part purchase systems
- Immediate response under load for quick Cunningham and jib lead adjustments
- Accepts line up to 1/4 in (6 mm) diameter
- Maximum working load: 525 lbs (240 kg)
- Breaking load: 1,575 lbs (720 kg)
- Ultralight: 1.07 oz (30.4 g); compact length of 1 11/16 in (43 mm)
- Optimized for dinghies, beachcats, and sportboats
- Country of origin: United States
