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Ronstan 20mm Single Upright Lead Block Lead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers. Precision moulded Acetal sheaves running on stainless steel or Torlon. ball bearings provide high performance and low friction. Sheave X: 20 mm Max. Rope X: 6 mm Fastener X: 4mm Max working load: 250 kg Breaking load: 550kg Weight: 18g
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