Double Aluminum Block 504-25Double sheave block with anodized aluminum cheeks. Works with 504 35, 504 75, 504 76 for a 4: 1 purchase. Delrin(tm) sheaves ensure smooth operation and high safe working load. Swivel head may be locked in place to avoid twist. Sheave Dia. 2" (51mm), Thickness 1 21 32" (42mm), Width 2 1 8" (54mm), Length 5 1 16" (129mm), SWL 1750 lbs. (795kg), Weight 8. 3oz. (235g), Max Line 7 16" (11mm)
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