Package includes: Wheels + Axles + Screws + Wrench + Washers Size: wheel diameter is 60mm /thickness is 18mm, please check the size before your purchase. Material: the wheels are made by rubber, it can bear a large weight. Features: wear-resistant, noise-resistant, easy to install, very suitable for DIY use. Easy to Install: Simple luggage rollers, without professional instructions can install by yourself, very convenient. And pay attention to the tightness of the wheel at the time of installation, so that the luggage rollers can roll better. Material: Rubber + Metal Color: Black Quantity delivered: 2 pieces