Ronstan Series 40 Ball Bearing Block - Single Upright Lead [RF40171] Hunting & Fishing | Tackle Storage Ring ID: 3-9/16"

Ring ID: 3-9/16"

Color: Black/Grey

Anti-airlock feature allows pump to clear trapped air in rough water or when boat is anchored

Monitors two (2) separate areas simultaneously

12" Smooth rolling wheels offer substantial dock cushioning and feature molded-in valves to adjust the level of firmness

Ronstan Series 40 Ball Bearing Block - Single Upright Lead [RF40171] Hunting & Fishing | Tackle Storage Ring ID: 3-9/16"Series 40 Ball Bearing Block Single Upright Lead Lead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers. Precision molded Acetal sheaves running on Acetal or Torlon ball bearings provide high performance & low friction. The 2 stage ball bearing system provides consistent performance over the full load range. Applications: Typically used for halyards at the mast base. Materials: Acetal ball