Manual Steel Pulley Block, for lifting the equipments, Capacity: 1Ton
VEVOR 250 ft. L Twin Sheave Block and Tackle 6600 lbs. Capacity Climbing Pulley System with Double Braid Rope, Red SHLSJTZ11MM76MJLSV0 - The Home Depot
Wire Rope Pulley Block, Weight Lifting
How to Use a Single and Double Pulley System | Sciencing