Fangrui Product Details Item Name : Single Rope Pulley W Swivel Ring;bear Load : 0.03t (30kg) For Rope Dia. : 0.55mm/0.21inch ;ring Dia. : 1.1cm/0.43inch Size : 5 X 3 X 1.5cm / 1.96x 1.1 X 0.59inch (l*w*d);material : Metal Color : Red, Sliver Tone;weight : 58g A Pulley, 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. Only Pulley Here, Rope Is Not Included. Package Content : 1 X Pulley Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.