Introducing the Ronstan Low Friction Ring, designed for seamless performance in sailing and rigging applications. With a 21mm hole, this ring is perfect for various line sizes, ensuring smooth movement and reduced wear. Crafted from high-strength materials, it offers exceptional durability and resistance to the harsh marine environment. The innovative design minimizes friction, allowing for effortless adjustments and enhanced control. Whether you're a seasoned sailor or a weekend enthusiast, the RF8090-21 is an essential addition to your gear, providing reliability and efficiency on the water. Upgrade your rigging setup today!