Features: Feature: 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 effort5.Have a good load-bearing capacity6.Easy to use and lasting performanceNote: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.There are 1-3 mm errors with the measurements.Need to be measured with a vernier caliperColor: BlackMaterial: plastic+metalModel:W041-2 Size: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 screw