Ronstan series 45 Stand-Up Core Block™

Ronstan series 45 Stand-Up Core Block™

18 in stock

The Ronstan Core Block™ Stand-Up Block features an exceptional strength-to-weight ratio and is designed to handle high static loads with complete reliability. Its universal bearing system ensures smooth rotation, while the spring-loaded articulated base keeps the block upright, optimizing line angle and protecting the deck. Made from advanced engineering materials, it is highly resistant to corrosion and UV exposure. It is the ideal technical solution for halyards and running-rigging leads requiring durability and consistent performance.

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At Saildeck Gear, we specialize in technical rigging, blocks, winches, and deck hardware for boats between 30 and 60 feet. We know that every boat is different: working loads, mast dimensions, the type of maneuver, and how you use your boat—cruising, racing, or charter—all affect what you actually need.

That’s why we don’t publish a fixed price on the product page: we prefer to speak with you first.

Tell us which product you’re interested in and which boat you’ll be installing it on, and we’ll prepare a quote tailored to your setup, including technical advice and with no obligation.

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