Pulley Block Product Type Pulley Block Pulley Type Fixed Mount Type Upright Mount Working Load Limit 525 lb Operation Pulling Attachment Type Fixed Eye Compatible Rope Diameter 3/16 in Sheave Inside Diameter 1 in Sheave Depth 7/16 in Sheave Outside Diameter 1 1/2 in Compatible Rope Type Wire Rope Bearing Type Sleeve Attachment Inside Diameter 3/8 in Housing Material Carbon Steel Mounting Hole Diameter 3/8 in Number of Grooves 1 Sheave Material Steel Overall Height 3 1/4 in