Here we provide you with a double pulley with a double braid rope. Made of high-strength polyester, the breaking strength of our 1/2'' rope is up to 7700 lbs. Two pulleys adopt aluminum material, which is durable and not easy to rust. Our twin sheave block and tackle climbing system is suitable for indoor or outdoor use. It is an excellent double block and tackles pulley system for outdoor sporting lovers. | Twin Sheave Block And Tackle 0.43 | 0.5Inch 100-200Ft Twin Sheave Block with Braid Rope 30-35KN 6600-7705LBS Double Pulley | Red;White | Best Buy