Low Friction rings can be used as a lightweight alternative to a block in some applications. They are best suited for systems requiring relatively small line deflection angles, or for high static loads. The design achieves a nicely rounded internal profile for smooth control line trim under load, and a deep external groove to retain the rope securely within the large shoulders when spliced into a loop.
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![Ronstan Low Friction Ring - 16mm Hole [RF8090-16]](http://www.essentialmarineservices.com/cdn/shop/files/55373XL.jpg?v=1702382182&width=1445)