• Suitable size: Wheels with 36mm outer diameter, 6mm inner diameter, and 18mm depth. • Axle screw of 39mm and 40mm total length. • Material: Rubber with double metal ball bearings, wear-resistant. • Easy to replace: Simple installation with washer and replacement wrench. • Applications: For luggage, suitcases, inline skates, wheelchairs, etc. • Complete set: Includes 2 wheels, 2 wrenches, 4 axle screws, 4 screws, and 4 washers.