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The 20 mm Ronstan double block is a lightweight two-sheave block for lines up to 6 mm. It is well suited to small purchases, for example on control lines aboard dinghies and catamarans.
This website uses cookies, which are necessary for the technical operation of the website and are always set. Other cookies, which increase the usability of this website, serve for direct advertising or simplify interaction with other websites and social networks, will only be used with your consent.
