Color: Black Material: rubber metal Bearing diameter: 21mm Inner bearing diameter: 6mm Wheel diameter: 50 mm Wheel thickness: 18mm Shaft length: 35mm Installation: A simple luggage roll, without professional guidance, can be installed by yourself, which is very convenient. Pay attention to the tightness of the wheels when installing, so that the luggage casters can roll better. Advantages: High quality replacement wheels. Strong, quiet, load-bearing, double bearings, flexible rotation. Load-bearing: a single suitcase can load up to 51 kg without deflection, and it is safe and reliable to use. Cleaning : Replacement luggage wheels are easy to clean, and the wheels can be removed and cleaned. - Installation: Easy parts, without professional instructions can install by yourself , very convenient. And pay attention to the tightness of the wheel at the time of installation, so that the wheels can roll better. - Load: A single load of 50 kg, without get out of the phenomenon, safe and reliable in use. Package Included: 2 * Suitcase Wheel Kit (2 wheels, 2 axles, 2 screws to axles, 4 washers, 2 keys) Note: The data is manual measurement, please allow 1-150cm error, due to the light and screen differences, it there will be a certain color difference, the specific received in kind prevail.