


Harken 40mm Carbo Air Double Swivel Block with Becket - 2639
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Harken 40mm Carbo Air Double Swivel Block with Becket - 2639Harken 40mm Carbo Air Double Swivel Block with Becket 2639 40mm Carbo Air Double Swivel Block with Becket 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)440
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4.5 ★★★★★
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Product Reviews
★★★★★ 5
Nice, Tough & Comfortable!
Size: 6.5 Wide Big Kid, Color: Black
Bought as an everyday school shoe for my 10 year old son. He likes them a lot and is holding up great through rough boy play, and they still look good after a couple months now.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 20, 2026
★★★★★ 5
Great
Size: 4.5 Big Kid, Color: Pink/Purple
perfect
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Pink and purple perfection
Size: 13 Little Kid, Color: Pink/Purple, Size: 13 Little Kid, Color: Pink/Purple
Fits great and perfect colors for my (not so) little. This is her first pair of "tie" shoes so we're still learning, but the laces are a good length for teaching and practicing. She says they're very comfortable too.
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Reviewed in the United States on March 27, 2026
★★★★★ 5
TTS
Size: 5 Big Kid, Color: White
TTS, comfy
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Reviewed in the United States on November 24, 2025
★★★★★ 5
True to size
Size: 6.5 Big Kid, Color: Navy/Peel
My a likes the fit. Says they’re comfortable, lines the color.
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