Color Black Material Metal About this item A very cost effective way to extend the life of your luggage when a wheel is damaged. Perfect solution for not having to buy new luggage Materials: rubber and metal. Quality rubber and more stable bearing, wear, quiet can work well with the suitcase Size: 45 (outer diameter) x 18mm and center bearing inner diameter is 6mm, bearing inner diameter: 21mm. With 33 mm and 36 mm axles and washers to meet different needs Complete kit with: 4 suitcase wheels, 8 axles, 8 axle screws, 2 wrenches, 8 spacers Please carefully measure the diameter and width of your old wheel to select the correct size before ordering Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.