Half-Moon/Alum. Sheave 32-33-UC32 33 UC half moon lead block. Stainless steel cage and slider ensure high safe working load. Aluminum sheave runs on Nomex(tm) bearing with Torlon(tm) ball bearings for a low friction sheave and high safe working load. Center pin adjustment prevents snagging and accidental release. SS Springs keep block upright while allowing up to a 45 degree articulation to both sides. Track Size 1 1 4" x 3 16" (32 mm x 5 mm), Up to boat size 44', Displacement
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