RONSTAN 60 mm Core Stand Up Block - Swivel, RF64140 Brand_Lewmar low-friction blocks with high-load composite

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

Great for Cunninghams

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

preventing the sheave from rubbing on the cheeks and causing friction when the line lead in and out of the block isn’t perfect

the soft resilient cheeks reduce clatter and protect gelcoat while the snap shackle attachment provides quick and easy attachment with optional trunnion articulation

RONSTAN 60 mm Core Stand Up Block - Swivel, RF64140 Brand_Lewmar low-friction blocks with high-load compositeCore 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