Sheave Operation Pulling Working Load Limit 550 lb Compatible Rope Diameter 1/4 in Compatible Shaft Diameter 5/16 in Bearing Type Not Applicable Inside Diameter 5/16 in Outside Diameter 3/4 in Number of Grooves 1 Compatible Rope Type Fibrous Rope Bearing Seal Type Not Applicable Material Thermoplastic Overall Depth 3/8 in Finish Plain