Ronstan Series 75 Core Block - Single, Becket, Universal Head cooling even when reefing while sailing

even when reefing while sailing off the wind

Suitable for 12mm (1/2") diam

Width: 25mm

Sierra’s 10 micron filters are over 90% efficient at removing particles as small as 10 microns and have a flow capacity of up to 90 GPH

Ronstan Series 75 Core Block - Single, Becket, Universal Head cooling even when reefing while sailingCore Blocks are a true all round solution. A tuned 2 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. Acetal sheave, alloy cheeks and stainless fixings complete the durable package. For reliability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for