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![Harken 40mm Carbo Air Double Fixed Block w/Becket [2643]](https://cdn.shopify.com/s/files/1/0405/8454/4408/products/79740XL.jpg?v=1591395617)
![Harken 40mm Carbo Air Triple Swivel Block [2640]](https://cdn.shopify.com/s/files/1/0405/8454/4408/products/79736XL.jpg?v=1591395584)
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Description
Harken 40mm Carbo Air Triple Swivel Block [2640]40mm Carbo Air Triple Swivel Block Low friction Carbo Air blocks are lightweight, strong, reliableand affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming. Specifications: Sheave (mm)40 mm Sheave (in)1 9 16 in Maximum line (mm)10 mm Maximum line (in)3 8 in Maximum working load (kg)660 kg Maximum working load (lb)1455 lb Quick Guide (pdf)
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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![Raymarine Right Angle RayNet to RayNet - 10M [A80512]](https://cdn.shopify.com/s/files/1/0405/8454/4408/products/79181XL.jpg?v=1591393476)
4.5 ★★★★★
Based on 911 reviews
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Product Reviews
★★★★★ 1
Sizing way off
Size: One Size, Color: (100) White / White / Halo Gray
These were my favorite socks, at least the old style was. They redid them and I was okay with it. However, I don't understand how they are a one size fits most. I tried them on and they were still too big at the top. There was so much extra fabric at the toes. For reference, I wear a size 8.5 women's shoe, typically. The packaging says fits most from size 5.5 to 12. I don't understand how it fits that wide range of shoe size. Definitely returning these and I will be buying something else.
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Reviewed in the United States on October 10, 2024
★★★★★ 5
Genial
Size: One Size, Color: (015) Tetra Gray / Gray Matter / White Quartz
Me encanta la textura y sobre todo que tiene para que siempre sepas en cuál pies va!
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Reviewed in the United States on August 29, 2025
★★★★★ 5
Comfortable
Size: One Size, Color: (348) Silica Green / White / Titan Gray
Comfortable and stays in place
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Reviewed in the United States on May 27, 2025
★★★★★ 5
Best socks for work or working out.
Size: One Size, Color: (015) Tetra Gray / Gray Matter / White Quartz
Great socks. They stay on your heel! Love the material; breathable and not thick. Love the neutral tone colors.
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Reviewed in the United States on January 1, 2025
★★★★★ 3
Didn’t meet full expectations
Size: One Size, Color: (001) Black / Black / Jet Gray
Much shorter than anticipated.
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Reviewed in the United States on December 16, 2025
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