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The 20 mm Ronstan single block is a small, lightweight turning block for lines up to 6 mm. Weighing only 16 g, it suits control lines and purchases on 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.
