Ronstan Series 75 Core Block - Halyard, Screw Pin with Roller head trailer parts 5 Leaf - 500kg per

5 Leaf - 500kg per spring

ring diameter 63mm - protrusion 44mm - hull thickness range 8mm -50mm

The sophisticated NC-machined sheave features Generation 2 of our patented sheave cross-hole geometry

Stops porpoising

Ronstan Series 75 Core Block - Halyard, Screw Pin with Roller head trailer parts 5 Leaf - 500kg perCore 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