Vertical Lead Block ø30mm. Ronstan lead blocks are a compact solution for guiding halyards or other rigging control lines to cleats or clutches. Precision-moulded acetal sheaves, mounted on acetal or Torlon® ball bearings, provide high performance and low friction. The two-stage ball bearing system ensures consistent performance throughout the entire load range.
| Diameter | Max. Line | Working Load | Breaking Load |
| ø30mm | ø5mm | 300kg | 750kg |