Zircon blocks help trimmers match sail shapes to new conditions immediately. At the core of the Zircon performance are industrial ceramic ball bearings mounted inside caged races. The cages keep these bearings separated so they don’t bunch, touch, and stop each other. The result is the most efficient small boat block Harken has ever made. Zircon blocks are available in 40- and 57-mm sheaves in single and double blocks, with or without beckets.
Specifications:
Sheave dia. - 1 9/16 in | 40 mm
Length - 2 7/8 in | 73 mm
Weight - 0.93 oz | 26.5 g
Max. line dia. - 5/16 in | 8mm
Max. working load - 250 lb | 115 kg
Breaking load - 750 lb | 340 kg
WASHING INSTRUCTIONS:
Machine wash separately in cold water on a gentle cycle. Tumble dry separately on low heat. Add QE Home Wool Dryer
Balls to reduce wrinkles and increases drying efficiency. Touch up with a low heat iron as needed. Do not bleach or dry clean.
Size Chart
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