Features：1. This bearing pulley wheel can fit most gym equipment parts.2. Made of plastic (PA), it is sturdy and durableSpecification：Material: Plastic (PA)Color: BlackExternal Diameter: 96mm/3.78"Inner Diameter: 10mm/0.39"Thickness: 25mm/0.98"Depth of Groove: 7.5mm/0.3"Package Included:2pcs x Pulley Wheel .
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