• Suitable size: 80mm outer diameter, 24mm depth. • Axle screw: total length of 42mm and 40mm, size M5x0.8mm. • Material: rubber with double metal ball bearings. • Wear-resistant, strong, and reliable. • Easy to replace: simple installation, flexible rotation. • Applications: luggage, suitcases, inline skates, wheelchairs. • Complete set: 2 wheels, 2 keys, 4 axle screws, 4 screws, 4 washers.