
Ronstan
Ronstan RF41140 20mm Stand-Up Block | Light-Duty Pulley for Small Boats
The Ronstan RF41140 is a reliable and lightweight 20mm stand-up pulley block, engineered for light-load rigging applications on dinghies, tenders, and small keelboats. The integrated stand-up base keeps the block upright during operation, making it perfect for deck-mounted setups where line control and alignment are critical.
Designed for use in systems like flag halyards, cunninghams, outhauls, and trimming lines, this block features UV-resistant materials and a smooth sheave for efficient, low-friction performance. Compact, durable, and easy to install, it’s an ideal solution for permanent rigging on smaller boats.
✅ Key Features
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Ronstan RF41140 – 20mm stand-up block
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Keeps block upright for clean line handling
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Compact and lightweight design
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UV-stable materials for marine durability
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Suitable for flag halyards, outhauls, and light control lines
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Ideal for dinghies, tenders, and small yachts
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Easy to install on deck or spars
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Smooth sheave for low-friction operation
Ronstan RF41140 Stand-up pulley specifications:
- Sheave Diam. 40mm.
- Max. Rope Diam. 10mm.
- Max. Working Load - 400 kg
- B. L. - 800 kg