LUGGAGE SPARE WHEEL: Round 4-hole design, the wheels perfectly fit most luggage, rolling suitcases, light weight, heat insulation, moisture resistance, flame retardant, convenient use, etc. High quality leather rolling suitcase. EASY TO INSTALL: Left and right wheels, W041 small luggage wheel, please check wheel shape and mounting hole distance before purchasing. Easy to install without complex fixing tool. WHEEL HOLE DISTANCE: Measure your luggage with 4 screw holes, you can know if this wheelset is suitable. The 4 holes of the wheel are 31mm, 45mm, 40mm and 33mm (please check the picture size). DIY WHEEL: This is a DIY product. You must use the hole in the box to enlarge the hole to match the hole on the wheel when you install it. NOTE: Wheels do not fit all suitcases, please check type and size before ordering . If you choose the right type, but the hole distance of the wheels may not be completely same, you need to drill a hole on your suitcase and then assemble them. You can also contact us to choose the wheel type to save time.