Lewmar 50mm Single Synchro Block Ronstan Series 15 B - 12 1/4" (310mm)

B - 12 1/4" (310mm)

Lewmar 60mm 3 Sheave Synchro Organizer

Cut-Out Radii (Flat/Flange) R1 (in) - 1 7/16

Safe Working Load: 990 lbs

Lewmar 50mm Single Synchro Block Ronstan Series 15 B - 12 1/4" (310mm)Product Description Lewmar 50mm Single Synchro Block Lewmar's Synchro Blocks are engineered for speed, efficiency and superior handling. We use a combination of scientifically optimized 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 synchronized with the movement of the rope, providing you with an easier, smoother