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, transmit 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.