RONSTAN 60 mm Core Stand Up Block - Swivel, RF64140 Brand_Lewmar highly loaded systems using modern

highly loaded systems using modern line technology and reduced line diameters

low-friction blocks with high-load composite bearings carry wire halyards and control line cascades

Durable construction ensures reliable performance in sailing applications

they allow for multiple lines to be adjusted with a single winch

Great for Cunninghams

RONSTAN 60 mm Core Stand Up Block - Swivel, RF64140 Brand_Lewmar highly loaded systems using modernCore Blocks is a true all around solution. For reliability and long service life, these blocks are the right choice for sheets, halyards, and control line applications for cruising and racing. Universal Bearing: A tuned two stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Stage 1: Under moderate loads, Acetal ball