Ronstan Series 60 Core Block - Mast Base, Clevis Pin Head log gland so you can see the

so you can see the Gaskets and O-rings inside

Works in two ways

Injection moulded black nylon with non corrosive retainers

Comfortable over the shoulder leg straps

0L with open cooling systems

Ronstan Series 60 Core Block - Mast Base, Clevis Pin Head log gland so you can see theCore 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