A very cost-effective way of extending the life of your luggage when a wheel is damaged. Perfect solution to not having to buy new luggageMaterial: rubber and metal. Quality rubber and bearing more stable, wear, mute can work well with the suitcaseSize: 50(Outer Diameter) x 18(Wide)mm and Center Bearing internal diameter is 6mm, Inner diameter of the bearing: 21 mm. With 32mm and 35mm Axles and washers to meet different needsComplete kit with:4x luggage suitcase wheels, 8 x axles, 8 x axles screws, 2 x Wrenches, 8 x spacerPlease kindly measure the diameter and width carefully of your old wheel to select the proper size before ordering