Twin Sheave Block And Tackle 7500lb Pulley System Stainless Outdoor Sheave Block Large Breaking Strength Sturdy Material Double Pulleys Double Braid Rope Easy Operation Widely Used Breaking Length: 7700 lbs / 35 kn,Packing Weight: 15 lbs / 6.5 kg,Rope diameter: 1/2 in / 12 mm,Material: Forged Aluminum + Polyester,Rope Length: 150' / 46 m