[Please be sure to check the caster size before purchasing] This product is compatible with double wheels and is a caster cover that adapts to tires with a diameter of 5.5 cm (about 54-57.5mm±1mm). *It cannot be installed on a single wheel. *The width of the tire must be approximately 3 mm or more, and the gap between the wheel and axle must be approximately 4 mm or more. Please check your casters in advance to reduce problems when coming off or installing while driving. [100% silicone material] Designed with flexible silicone material that fits easily around tires. It is designed to be considerate of various road surfaces such as asphalt and gravel roads, and is easy to consider the surroundings even in situations where driving noise is a concern. This item is recommended for those who want to use their carry case carefully. [Supervised by an active CA × Japanese corporate planning] Supervised by an active flight attendant × A caster cover designed by a Japanese company. It is designed with ease of handling when moving and usability when storing. This set of 10 pieces, including spares, makes it easy to prepare for long trips and business trips, and is convenient for everyday use. [Washable with water! ] Consideration for the interior] Easy installation without tools and just put it on the casters. Stains can be cleaned by wiping or washing with water. By removing it after returning home, it is easy to reduce dirt brought into the room, and it is designed to be clean and easy to use. It is a useful item for travel and business trips, as well as for indoor storage. If you have any questions or concerns about the product, please feel free to contact our customer support once before using it.