Upgraded accessories: Made of environmentally friendly PU material and carbon steel. Superior material: Constructed from environmentally friendly PU and carbon steel, featuring wear-resistant and quiet wheels for a smooth and quiet experience. Size: Luggage wheel replacement dimensions: Wheel outer diameter: 50mm; wheel width: 18mm; center internal diameter: 6mm (0.23 inch). Please check the size carefully before ordering. Easy installation: Simply remove the old wheel using a hacksaw at the gap, then install the new wheels with the included accessories. Application: This luggage wheel replacement kit is suitable for luggage cases, swivel casters, roller skates, and similar applications. Color: Black Material: PU + carbon steel Package contents: 2 x Luggage suitcase replacement wheels 2 x Axles and screws 2 x Screw wrenches 4 x Carbon steel washers 4 x Gaskets Note: Light reflection and differences in display screens may cause slight variations in color. Measurement may vary by +/- 1-3 cm.