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Ronstan Series 40 Ball Bearing Block - Single Upright Lead - RF40171

Marsoni M251S
Sale price$46.99
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Ronstan Series 40 Ball Bearing Block - Single Upright Lead - RF40171Series 40 Ball Bearing Block Single Upright Lead Lead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers. Precision molded Acetal sheaves running on Acetal or Torlon ball bearings provide high performance & low friction. The 2 stage ball bearing system provides consistent performance over the full load range. Applications: Typically used for halyards at the mast base. Materials: Acetal ball
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
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4.4 ★★★★★
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Mr.C
Lexington, US
★★★★★ 4
Amazing wallet.
Size: One Size, Color: Black Signature
Beautiful, soft luxury wallet. I wish it was RFID protective but the wallet is amazing. Well worth the price. It's my first coach brand purchase. Very happy with it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 15, 2026
J
Verified Purchase
Jazzy J
Massapequa, US
★★★★★ 5
Awesome color
Size: One Size, Color: Army Green1
Husband loves this wallet. Super soft leather. Great color.
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Reviewed in the United States on August 25, 2025
S
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Solomon v Bowleg ll
Battle Creek, US
★★★★★ 5
Quality
Size: One Size, Color: Charcoal/Black
Great quality and size
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Reviewed in the United States on January 2, 2026
M
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Mrs. O
Waukegan, US
★★★★★ 5
Nice fit jogger set
My husband is a midsized guy in weight and also an old school guy he don't like the skinny leg pants so these were perfect I ordered more than one. He says they are very comfortable.
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Reviewed in the United States on November 12, 2025
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Amazon Customer
Battle Creek, US
★★★★★ 5
Beautiful Track suit
Great product and great price
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Reviewed in the United States on December 30, 2025

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