
Ronstan
Ronstan RF51200 50mm Double Block | Series 50 Stainless Sailing Pulley
The Ronstan RF51200 is a durable and efficient 50mm double pulley block, designed for medium-load rigging applications on dinghies, keelboats, and small yachts. With twin sheaves and 316 stainless steel cheeks, this block delivers smooth, low-friction performance in tough marine conditions.
Ideal for control lines, vang systems, cunninghams, and other multi-line setups, the RF51200 is built to handle demanding sailing environments. The UV-resistant acetal sheaves ensure long-lasting durability and consistent line handling, making it a trusted choice for performance-focused sailors.
✅ Key Features
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Ronstan RF51200 – 50mm double pulley block
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Twin UV-resistant acetal sheaves for smooth operation
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316 stainless steel cheeks for marine durability
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Designed for medium-load applications
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Ideal for vang systems, outhauls, and control lines
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Reliable, corrosion-resistant construction
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Compact and efficient twin-sheave design
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Part of the Ronstan Series 50 block range
Ronstan RF51200 50mm Double Pulley specifications:
- Sheave Diam. 50mm
- Max. Rope Diam. 12mm
- Pin Diam. 1/4 in.
- Max. Working Load 2200 lb
- Breaking Load 4410 lb