This is a very cost-effective way to extend the life of your luggage when the wheels are damaged. The perfect solution without having to buy new luggage Material: rubber and metal. High quality rubber and more stable load-bearing, wear-resistant, quiet and can be used well with luggage Dimensions: 50 (outer diameter) x 18 (width) mm, inner diameter of the center bearing: 6 mm, inner diameter of the bearing: 21 mm. Equipped with 32 mm and 35 mm axle wheels to meet your different needs The complete set includes: 4 wheels of luggage, 8 axles, 8 axle screws, 2 wrenches, 8 spacers Please carefully measure the diameter and width of your old wheels before ordering to choose the right size. p>