• [Improved Caster Covers] Our suitcase wheel covers have two sides. One side is thinner to face the inside of the suitcase wheels, and the other side is thicker and longer to fit the outside of the suitcase wheels more snugly. The improved protective covers are less likely to come off the wheels and do not snag. • [Easy to Install and Clean] Simply slip them on for use, with installation taking only a few seconds. Protects wheels from outdoor elements and ensures durable wear protection. • [Protects Casters] The 2mm thick outer design more effectively protects the casters. It avoids external damage and extends the life of the casters. • [Noise Reduction for Comfortable Use] The 1.3mm thick inner design reduces friction between the casters and the ground, suppressing noise generation. It reduces discomfort from direct contact with the ground and enhances comfort during use. • * Before purchasing, please ensure that your suitcase has dual wheels and that the wheel size, axle distance, and fender size meet the dimensional requirements shown in the main product image.