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Product Specification Item type: nylon pulley;material: nylon + iron core;color: black;90mm (3.54 inches) Diameter; Hole inner diameter: 10mm(0.39 inches);Width of groove: 10mm(0.39 inches) Features of Nylon wheel 90mm Lightweight, easy to install Wearproof, long service No friction sparks, good safety performance. Load capacity up to 1000lbs Nylon Pulley Bearing pulley as a tower crane accessories have been widely used in the lifting equipment, with its unique advantages gradually replace the old metal pulley. Universal bearing pulley wheel are not only