Pulley Block Product Type Pulley Block Pulley Type Mounted Mount Type Side Mount Upright Mount Working Load Limit 1 550 lb Operation Pulling Attachment Type Bolt-On Compatible Rope Diameter 5/16 in Sheave Inside Diameter 3 in Sheave Depth 5/8 in Sheave Outside Diameter 3 1/2 in Compatible Rope Type Wire Rope Bearing Type Sleeve Attachment Inside Diameter Not Applicable Housing Material Carbon Steel Mounting Hole Diameter 1/4 in Number of Grooves 1 Sheave Material Steel