Features:1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information;2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.3.Great used for luggage, suitcase,and trolley.4.Wheels is very flexible to use,and you can save a lot of effort.5.Have a good load-bearing capacity.6.Easy to use and lasting performance.Note:1.This is DIY parts.2.The holes between suitcases and wheels maybe little different because of different production batch,if not match,you need to adjust the holes by digging the holes on the suitcase by yourself.3.Once position the hole,you can install it with screw.Whatever the difference is,you can adjust the hole on the suitcase,and then install with screws.4.Before purchasing, compare whether the arrangement of holes is consistent.5.Compare the size of the hole position and the height of the backrest at the edge of the screw hole.6.Only after the size is confirmed can it be ensured that it can be replaced perfectly.7.To make sure that it is suitable for your use, please check the dimension on the picture and description.And there is 3mm error for manual measurement.Specifications:Color: BlackMaterial: plastic+metalModel:W041-2Screw hole edge backrest height: 11mm/0.43inchSize:9.6 x 9.3 x 4.8cm/3.78 x 3.66 x 1.89 inch(L x W x Dia)Weight:250gPackage include:2 x Luggage Swivel Wheel8 x Screws1 x Screwdriver