PLEASE confirm the size of this luggage wheel before purchasing. Upgraded accessories: Made from environmentally friendly PU material with no objectionable odor. Bearings are made of carbon steel, providing wear-resistant and quiet wheels for a smooth, silent experience. Wheel diameter: 55mm. Rim width: 18mm. Center bearing internal diameter: 6.1mm. Set of 2 luggage suitcase replacement wheels, integrally molded for increased durability and reduced noise. Easy to install: 1. Use a hacksaw to remove the pole connecting the old wheels. 2. Install the new wheels using the included accessories. Color: black. Material: Environmentally friendly PU + carbon steel. Package contents: 2 x wheels, 2 x axles, 2 x axle screws, 4 x washers, 2 x wrenches. Only the items listed are included; other products are not part of this package. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.