ITEM NAME:5 Pcs 0.03T 30kg 66.1Lbs Metal Lifting Crane Pulley Block G1J3 5 Pcs 0.03T 30kg 66.1Lbs Metal Lifting Crane Pulley Block G1J3 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, transmit rotational motion, or realize a mechanical advantage in either a linear or rotational system of motion. Only pulley here, rope is not included. Item Name : Crane Pulley Block; Bear Load : 0.03T (30kg)/ 66.1Lbs For Rope Dia. : 6mm/ 0.24"; Hook Dia : 11mm/ 0.43" Overall Size : 6.7 x 2.6 x 2.4cm/ 2.6" x 1" x 0.94" (L*W*T); Material : Metal Main Color : Silver Tone; Weight : 237g Package Content : 5 x Crane Pulley Block Note:Light shooting 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 +/-1-3 cm.