1Material: Made of high quality PP and PET materials, safe and environmentally friendly and durable. 2Performance: Silent during use, wear resistant for long term use, exquisite workmanship, practical for replacement the old or damaged ones. 3Installation: Easy to install, open the trunk shell, open the lining zipper, find the screw position and remove the screw and old wheels, then screw on the new wheel. 4Package Content: Equipped with multiple screws in the package for installation to bring you convenience. 5High Bearing: The wheels are sturdy with a good load bearing capacity to support your luggage case and save your energy.