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Ultimate Harken 125mm Alum Swivel Block Series [1MbW5K39]

$140.99 $451.99 -69%

Ultimate Harken 125mm Alum Swivel Block Series [1MbW5K39] Experience the pinnacle of performance and durability with the Ultimate Harken 125mm Alum Swivel Block Series [1MbW5K39]. This innovative swivel block is designed to handle the demands of high-performance sailing, offering exceptional strength an

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Ultimate Harken 125mm Alum Swivel Block Series [1MbW5K39]

Experience the pinnacle of performance and durability with the Ultimate Harken 125mm Alum Swivel Block Series [1MbW5K39]. This innovative swivel block is designed to handle the demands of high-performance sailing, offering exceptional strength and corrosion resistance. Engineered for reliability, the Ultimate Harken 125mm Alum Swivel Block Series [1MbW5K39] is the ideal choice for sailors who demand the best.

Robust Construction

The Ultimate Harken 125mm Alum Swivel Block Series [1MbW5K39] boasts sideplates constructed from hardcoat-anodized 6061-T6 aluminum, ensuring both strength and corrosion resistance. This durable material withstands the harshest marine environments, making it a reliable companion for your sailing adventures. Key features include:
  • Hardcoat-anodized 6061-T6 aluminum sideplates
  • Heat-treated stainless steel inner race for maximum load-bearing capacity
With these features, the Ultimate Harken 125mm Alum Swivel Block Series [1MbW5K39] is built to last, providing you with peace of mind on the water.

Ultralight Composite Bearing System

The Ultimate Harken 125mm Alum Swivel Block Series [1MbW5K39] is equipped with an ultralight composite bearing system (ULC), which rides on a heat-treated stainless steel inner race. This advanced system is designed to handle extremely high loads, ensuring smooth and efficient operation. Benefits of the ULC system include:
  • Reduced weight for improved performance
  • Increased durability and lifespan
The Ultimate Harken 125mm Alum Swivel Block Series [1MbW5K39] is not just a piece of equipment; it's a commitment to excellence in sailing performance.

What Our Customers Say

January 11, 2026

Absolutely no complaints!

It's a real pleasure to use this daily.

- Levi W..

January 11, 2026

Absolutely no complaints!

I'm so happy. It is a very great product.

- Lauren G..

January 11, 2026

Absolutely no complaints!

This is a very fine purchase to have gone and made.

- Edna F..

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