Harken 57 mm Zircon Double Block, 2197 Item Type_Extrusions and Foil Connectors Ball-bearing sheaves minimize friction

SKU: 21071824746

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Harken 57 mm Zircon Double Block, 2197 Item Type_Extrusions and Foil Connectors Ball-bearing sheaves minimize frictionZircon blocks are the most efficient small boat blocks Harken has ever made. At the core of Zircon's performance are industrial ceramic ball bearings mounted inside caged races. The cages keep these bearings apart so they dont bunch up, touch, and stop each other. The result is a very free running block with less energy lost to friction than in even our current Carbo blocks. Give an unrigged Zircon block a strong spin, and it spins for an incredibly

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