Specifications: Model: GD-60S Material: carbon steel, nitrile rubber, aluminum, nylon Wheel diameter: 50mm / 1.97inch Tread width: 25mm / 0.98inch Tread hardness: 70 Shore D Center bolt: M12 Bolt length: 35mm / 1.38inch Leveling range: 10mm / 0.39inch Overall height: 82mm / 3.2inch Single wheel load capacity ：250kg / 551lbs Total load capacity：1000kg / 2204lbs The package includes: 1X set of 4 leveling castors.
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