Lewmar 50mm Synchro Block - Single [29925001BK] Cartography | Garmin BlueChart a backbone cable runs through

a backbone cable runs through the length of the boat

A (inch) 2-21/64"

The Navionics® Chart Installer software also ensures the freshest chart data every time

Weight: 14 ounces

Chirp: High Wide/Non Traditional

Lewmar 50mm Synchro Block - Single [29925001BK] Cartography | Garmin BlueChart a backbone cable runs through50mm Synchro Block Single Lewmar's Synchro Blocks are engineered for speed, efficiency, and superior handling. Using a combination of scientifically optimized block geometry, a Free Spin bearing, and a self aligning head to reduce friction and increase efficiency by up to 40%, over budget blocks on mainsheet systems. Each component is perfectly synchronized with the movement of the rope, providing you with an easier, smoother transfer of power from