Clamp On Furling Block 300-34300 34 Clamp on Furling lead block. Delrin(tm) ball bearing sheave allows for quick and easy furling line adjustment. Stainless steel cage and strap ensure durability. First stanchions 1" (25mm) in diameter. 1 7 16" (37mm) Sheave Diameter, Maximum 7 16" (10mm) line size. Safe Working Load = 1000 lbs (450kg)
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