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![Ronstan Nylatron Sheave Box - Single Upright Lead Block [RF453]](http://www.dbmarinesupplies.com/cdn/shop/files/55219XL_medium.jpg?v=1682682740)
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Nylatron Sheave Box - Single Upright Lead Block
Lead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers.When mounted in an inverted position, are frequently used as upright leads.
Features:
The external tabs can be formed to fit the spar profile before fastening
Applications:
Typically used in dinghy spars for control lines such as outhauls
Materials:
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