Lewmar 50mm Double Synchro Block 420302 base layer Shackle pin Ø (mm) 5

Shackle pin Ø (mm) 5 mm Shackle pin Ø (in) 3/16 in

mild acids and alkalis

Removable Flap on back for extra neck protection

and a great all-rounder

Lewmar 50mm Double Synchro Block 420302 base layer Shackle pin Ø (mm) 5Lewmar's Synchro Blocks are engineered for speed, efficiency and superior handling. We use a combination of scientifically optimised block geometry, a free spin bearing and self aligning head to reduce friction and increase efficiency by up to 40% over budget blocks on mainsheet systems. Each component is perfectly synchronised with the movement of the rope, providing you with an easier, smoother transfer of power from deck to sail and less wear on