Ronstan Series 40 Ball Bearing Block - Single Upright Lead [RF40171] Marine Navigation & Instruments | GPS - Track Plotter 12" x 12" Standard Mount

12" x 12" Standard Mount Trim Tab Kit without Switch Kit- 12V

No need for additional drive units

or at home

100% factory tested

Silent and vibrationless operation

Ronstan Series 40 Ball Bearing Block - Single Upright Lead [RF40171] Marine Navigation & Instruments | GPS - Track Plotter 12" x 12" Standard MountSeries 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