Harken 29mm 90-Degree Block

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Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to our popular Harken Big Boat blocks, these small, compact blocks have very high working loads for safe, easy trimming.


Sheave Ø (mm) 29 mm
Sheave Ø (in) 1 1/8 in
Length (mm) 52 mm
Length (in) 2 1/16 in
Weight (g) 26 g
Weight (oz) .9 oz
Maximum line Ø (mm) 8 mm
Maximum line Ø (in) 5/16 in
Maximum working load (kg) 150 kg
Maximum working load (lb) 330 lb
Breaking load (lb) 1000 lb
Breaking load (kg) 454 kg