SPARE WHEEL FOR LUGGAGE: 4-hole round design, wheels fit most luggage, rolling suitcases perfectly, light weight, heat insulation, moisture resistance, flame retardant, convenient use, etc. High quality leather trolley case. EASY TO INSTALL: Left and right wheels, W041 small luggage wheel, please check the wheel shape and mounting hole distance before purchasing. Easy to install without complex fixing tool. DISTANCE FROM WHEEL HOLE: 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 size in the picture). DIY-MOUNT WHEEL: It is a DIY product. You need to 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.