Caster Covers Suitcase Tire Covers Set of 8, Widened Design, Luggage Wheel Covers, Anti-Drop, Carry Bag Wheel Covers, Silent, Dirt and Scratch Prevention, Anti-Rolling, Luggage Protection, Noise Reduction, Silicone Tire Socks, Ground Protection, Wheel Protection, Easy Installation [Improved Caster Covers, Set of 8] Diameter is approximately 53mm, width is approximately 15mm. Applicable to casters with a diameter of 56-80mm. Note: ① Only applicable to double-wheel caster types. ② Please ensure there is a 3mm distance between the wheel and the axle. [Widened Outer Design, Anti-Drop] Unlike other companies' products, these suitcase caster covers have a different design with a difference in inner and outer width. The outer width is 10mm and the inner width is 5mm, ensuring easy installation while further improving stability during movement, making them less likely to fall off. [Solve Noise/Dirt/Wear Problems All at Once] The design mimics the texture of car tires, effectively absorbing noise and impact, and providing excellent silent performance. The elastic silicone carry case wheel covers cover the wheels, preventing ground dirt, reducing wheel wear and damage, and extending the life of the suitcase. [Washable Suitcase Tire Covers] Made of high-quality silicone, they can be washed, and there is no need to worry about odors. After washing, they will be as good as new and can be recycled. You can always keep your suitcase clean indoors. 51-64