Ronstan Series 75 Core Block - Double, Non-Swivel Head muffler A special tracking feature

A special tracking feature

The base mount is made from stainless steel and is adjustable to suit your boat

Skeg Bush for Re-bushing Skegs

Self-lubricating Acetal polymer sheave ensures low friction and extreme durability

PCM Part # R066028

Ronstan Series 75 Core Block - Double, Non-Swivel Head muffler A special tracking featureCore 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