Block Size: 6"Rope Diameter: 3/4"Safe Work Load: 1,800 lbs.Sheave Size: 3-1/2" Outside DiameterSheave Width: 1"One Sheave DesignDrop Forged Galvanized Parts With Wooden BlockBronze Self-Lubricating Bushings For Smooth Long Lasting ActionRound Loose Hook With Safety Spring Latch To Ensure Block Does Not Move While Being UsedDesigned To Be Used With Manila Rope