quiet operation and smooth roll: These luggage wheels are made of rubber and designed to be super silent, delivering a quiet, smooth rolling experience for your suitcase. Easy installation and broad compatibility: Replacement wheels with a standard center bearing ID of 6mm, designed to fit most luggage models. Simple installation to restore mobility quickly. Flexible size options: Available in 50mm, 45mm, or 60mm wheel diameter. Wheels are 18mm thick and come with 35mm long axles. Complete replacement kit: Includes 4 luggage wheels, 4 axles (35mm), 4 axle screws, 2 wrenches, and 8 washers, enabling you to all four wheels of your luggage in one go. Practical use scenarios: Replacing worn or damaged wheels on dailyuse suitcases to restore glide and reduce noise on travel days. Upgrading wheels for travel on varied surfaces, such as airports, sidewalks, and hotel floors, where smoother, quieter rolling is beneficial. Selecting the appropriate size to match luggage type: use 45mm for standard carryons, 50mm for midsized bags, or 60mm for larger suitcases to optimize stability and mobility. Compatibility and benefit emphasis: Fits most luggage models with a 6mm center bearing, making it a versatile replacement option that improves function, reduces noise, and extends the life of your luggage.