This trolley case luggage leather luggage mute damping wheels,Wheels wear flexible, easy accessibility Single load 60 kg, there is no phenomenon, Quietness and flexibility are perfectly safe to use . Color: Black; Material: Metal + rubber Size: Rubber OD: 50mm Side tchiness: 15mm Ball bearing Hole: 6.1mm Weight: 150G Wear, mute, load-bearing, double bearing, rotating flexible, Sliding effort, without effort, than the original luggage wheels are easy to use. need to measure the following data to know what size you are suitable with wheels measuring the original outer diameter wheels (wheel size). the inside of the measuring wheel groove width (width of the total installed width). through the length measuring wheel screw screw (excluding nuts at both ends) measured through the wheel screw diameter pipe thickness (ie bearing bore width) Package Contents: 2 sets of Luggage Suitcase Replacement Wheels (2 Wheels, 2 Axles,2 Axles screws,4 bearings,4 Washers, 2 Wrenches) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.