Packing list :2pcs wheel as first photo and come with Screw Material of Item: PVC + PP + Nylon Bearing Size of item :As last photo show Product features: wear resistant ,Suitable for the use of ordinary luggage box ,And need you have a strong ability in DIY Please see the attached image for the approx. wheel widths for each diameter. This is the wheel kit that can rotate 360° silently, as long as you compare the holes above the picture and can match the wheels you need, then they will be the perfect replacement wheels for your luggage, the tool included can be used for you to replace them manually conveniently, the process is simple, the wheels are good quality, strong and wear-resistant, with good load bearing capacity, save your effort in using them, and glide silently. Good luck finding the right wheels for your replacement and have a great experience in using them!