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Reduce weight and bulk with Ronstan's Series 40 Ball Bearing Orbit Blocks. They are made almost entirely of high-tech, composite, polymer materials.
Ronstan's two-stage bearing system features high-compression grade Acetal ball bearings and a secondary full-contact Nylatron sheave and full contact bearing for dynamic loads, which results in minimum friction.
Use these blocks in mainsheet and spinnaker sheet, halyard, vang, and backstay systems on dinghies and for control line applications on larger boats.
This cheek block has a recessed underside to suit curved mounting surfaces and it has low mounting points for maximum strength. It also has a lightweight integrated Dyneema becket link.
