


Ronstan Series 40 All Purpose Block - Single Upright Lead - RF41171
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Ronstan Series 40 All Purpose Block - Single Upright Lead - RF41171Series 40 All Purpose Block Single Upright Lead Lead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers. Ideal for high load applications. Wear resistant sheave material, in lightweight, self lubricating polymer, is suitable for use with rope or wire. Applications: Typically used for halyards at the mast base. Materials: UV stabilised acetal sheave Grade 316 stainless steel load housing
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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★★★★★ 5
The comfiest shoe!
Size: 7, Color: Chestnut Multi
True to size! Comfy! Like pillows!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026
★★★★★ 5
The quality is excellent 👌
Size: 8, Color: Chestnut Multi
I love it 🥰
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
★★★★★ 5
The comfiest shoe!
Size: 7, Color: Chestnut Multi
True to size! Comfy! Like pillows!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026
★★★★★ 5
The quality is excellent 👌
Size: 8, Color: Chestnut Multi
I love it 🥰
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
★★★★★ 5
The comfiest shoe!
Size: 7, Color: Chestnut Multi
True to size! Comfy! Like pillows!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026