Ronstan Series 45 Core Block - Single, Swivel Shackle Head ronstan stand-up base - suits series 70 ball bearing ratchet orbit blocks as used on most American

as used on most American boats

Available in 2 styles bolt-on version for permanent mounting or clip-on version for removable use

Cowl mouth has a rolled edge for safety and added stiffness

see nipples

Hinge Offset HD 130mm S/S

Ronstan Series 45 Core Block - Single, Swivel Shackle Head ronstan stand-up base - suits series 70 ball bearing ratchet orbit blocks as used on most AmericanCore 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