Pulley Block Product Type Pulley Block Pulley Type Swivel Mount Type Upright Mount Working Load Limit 1 550 lb Operation Pulling Attachment Type Swivel Eye Compatible Rope Diameter 5/16 in Sheave Inside Diameter 3 in Sheave Depth 5/8 in Sheave Outside Diameter 3 1/8 in Compatible Rope Type Wire Rope Bearing Type Sleeve Attachment Inside Diameter 1 3/16 in Housing Material Carbon Steel Mounting Hole Diameter 1 3/16 in Number of Grooves 2 Sheave Material Steel