High quality olyurethane for a smooth ride that won't scratch floors 72 mm Diameter, 22 mm Width, 10 mm Axle/Inner Diameter. Not scrathes in floors and friendly for flooring suitable for panda magic car and other campany magic car can fit you can fit esaily in magic car it issutable for almost all type of magoc car lenth=25CM Width=15CM inner daimater=1.5CM. These wheels give you a faster and smoother ride that's great for both kids and adilts. Compatible with all models and styles of swing cars.