Fangrui Product Details Product Name: Crane Pulley Block; Main Material: 304 Stainless Steel Weight: 435g; Sheave Size: 15 X 10mm/0.59x 0.4 Inch(d x t) Sheave Quantity: Singe Sheave; Overall Size: 62 X 21 X 16mm/2.4x 0.83 X 0.63 Inch(l x w x t) Main Color: Silver Tone; For Rope Dia.: 6mm/0.24 Inch Swivel Eye Inner Size: 14 X 11mm/0.55 X 0.43 Inch (l x W ); Swivel Eye Thickness: 4mm/0.16 Inch A Crane Pulley Block Is A Kind Of Hoisting Tool, Also Called A Sheave, Is A Mechanism Composed Of A Wheel On An Axle Or Shaft That May Have A Groove Between Two Flanges Around Its Circumference. A Rope, Cable, Belt, Or Chain Usually Runs Over The Wheel And Inside The Groove, If Present. Pulleys Are Used To Change The Direction Of An Applied Force, Mit Rotational Motion, Or Realize A Mechanical Advantage In Either A Linear Or Rotational System Of Motion.designed For Use With Rope Or Cord In Indoor And Outdoor Applications, But Only Pulley Here, Rope Is Not Included. Package Content: 10pcs X Crane Pulley Block Only The Above Package Content, Other Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.